3x-(4x-9)=7

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Solution for 3x-(4x-9)=7 equation: 



3x-(4x-9)=7

We move all terms to the left:

3x-(4x-9)-(7)=0

We get rid of parentheses

3x-4x+9-7=0

We add all the numbers together, and all the variables

-1x+2=0

We move all terms containing x to the left, all other terms to the right

-x=-2

x=-2/-1

x=+2

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