How do you solve this problem (3x+7)+(4x-9)=?

Question

How do you solve this problem (3x+7)+(4x-9)=?

Answer 1

drop the parentheses because it merely states to add 4x and add (-9) to (3x+7). Then 3x+4x=7x and 7+(-9)=-2, so 7x-2=0 move the 2 over and divide both sides by seven and x=2/7

Answer 2

since it is an addition sign between the brackets you can simply remove the brackets:

= 3x + 7 + 4x - 9 = 7x - 2

Answer 3

Hi,

For this question, get rid of the parentheses to say the following:

3x + 7 + 4x - 9 = ?

Now, notice that we can combine similar terms by combining the terms with the x's and the constants separately.

Therefore, we get:

7x - 2 <=== FINAL ANSWER

I hope that helps you out!  Please let me know if you have any other questions!

Answer 4

we are not solving here as there is nothing to the right of the equal sign, we are simplifying.

(3x+7)+(4x-9)

= 3x+4x +7 -9

  = 7x -2

thanks to the "mature person" who gave me and others the thumbs down- after all these years teaching u'd think i'd know how to answer this question - cheers!