How do you simplify expressions in pre algebra?

First rewrite the expression BUT group the like terms. That is, all the x terms together, all the y terms together and so on 9y + (-2y) = 9y-2y = 7y Do the same with the 'x' term So 9y + (-2y) + (-3x) -4x +8 7y - 7x + 8 this is an acceptable simplification hope that helps :)

Simplifying expressions means getting the expression in a form that has the least amount of terms. In the case of 9y+8+(-3x) +(-2y)-4x.... what you want to do is combine like terms. 9y and -2y are like terms because they both have the variable "y" -3x and -4x are like terms because they both have the variable "x" 8 is a constant. There are no other constants in this expression so it remains by itself. Basically add the like terms to simplify the expression. 9y-2y= 7y -3x-4x= -7x Thus the final answer is 7y-7x+8 If you're still having trouble, check out this video on YouTube about simplifying expressions with multiple variables: http://www.youtube.com/watch?v=MjAcASWqZS4&feature=player_embedded Also, http://www.khanacademy.com is an excellent place for free math tutorial videos. I use it myself.

all you do is add the common variables. add 9y + -2y (7y) add -3x + -4x (-7x) and leave eight as it is this will get you 7y - 7x + 8 (the order doesnt matter) and there is your simplified expression!

9y+(-2y) = 7y (-3x)+(-4x) = -7x simplified expression is 8-7x+7y

Simplifying expressions is getting all the values to look simple in an expression. Remember it is the rule in math that when you have a - sign with a + sign, it means you eliminate the + sign and leave the - sign and that will eliminate the parentheses. This is for monomials only, so in this question, it is simple. 9y + 8 - 3x - 2y - 4x, the 9y has a + sign Remember that you can rearrange this expression in any way, as long as you keep the + and - signs next to their right. You can rewrite the expression as 9y - 2x - 4x - 2y + 8 or 8 - 2y + 9y - 2x - 4x or -2x - 2y - 4x + 8 + 9y, etc. Because of this, you can rearrange this into the following with variables (letters) next to each other: -2x - 4x + 9y - 2y + 8 You know what they mean by "combine like terms". If not, it is to add or subtract terms (individual, simplified numbers) with the same variables next to them, raised to the same power. If you want to add the terms 2a and 4a, they are (2 + 4)a, which is 6a. However, if you want add the terms 3a and b, you can't because those variables aren't related. Instead, you leave it as 3a + b. This applies to numbers with no variables next to them. For this reason, subtract 4x from -2x. This is (-2 - 4)x, which is -6x. -6x + 9y - 2y + 8 Subtract 2y from 9y. This is (9 - 2)y, which is 7y. Leave a + sign next to it, since it is positive. -6x + 7y + 8 This cannot be simplified anymore, because no other signs are in common. You should put these in "descending order"–the numbers are arranged in order from the order of the variables next to them (and the order of the value of the exponent they are raised to from greatest to least). In this case, they already are. Your simplified expression is -6x + 7y + 8

1. look do you have any similarities within expression so here you have 9y and (-2y) they both have <<y>> 2. look at the signs (you must be careful with plus and minus 3. do the action here it is 9y+(-2y)=7y DO OTHERS THE SAME WAY (-3x) - 4x= -7x and because 8 is the only number without anything and there is no other number you can't do any action with it,,,,so it will stay as it was NOW LET@S PUT EVERYTHING TOGETHER 9y+8+(-3x) +(-2y)-4x=7y+8-7x

Simplifying expressions means getting the expression in a form that has the least amount of terms. In the case of 9y+8+(-3x) +(-2y)-4x.... what you want to do is combine like terms. 9y and -2y are like terms because they both have the variable "y" -3x and -4x are like terms because they both have the variable "x" 8 is a constant. There are no other constants in this expression so it remains by itself. Basically add the like terms to simplify the expression. 9y-2y= 7y -3x-4x= -7x Thus the final answer is 7y-7x+8 If you're still having trouble, check out this video on YouTube about simplifying expressions with multiple variables: http://www.youtube.com/watch?v=MjAcASWqZS4&feature=player_embedded Also, http://www.khanacademy.com is an excellent place for free math tutorial videos. I use it myself.

This Site Might Help You. RE: How do you simplify expressions in pre algebra? My pre algebra teacher taught us how but I never really got it. HOW DO YOU DO IT?!?!? ex. What is the simplified expression for 9y+8+(-3x) +(-2y)-4x?

First rewrite the expression BUT group the like terms. That is, all the x terms together, all the y terms together and so on 9y + (-2y) = 9y-2y = 7y Do the same with the 'x' term So 9y + (-2y) + (-3x) -4x +8 7y - 7x + 8 this is an acceptable simplification hope that helps :)