9x-(4x+3)=7x-21

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Solution for 9x-(4x+3)=7x-21 equation: 



9x-(4x+3)=7x-21

We move all terms to the left:

9x-(4x+3)-(7x-21)=0

We get rid of parentheses

9x-4x-7x-3+21=0

We add all the numbers together, and all the variables

-2x+18=0

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

-2x=-18

x=-18/-2

x=+9

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