7-9x-12=21-3x-7

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Solution for 7-9x-12=21-3x-7 equation: 



7-9x-12=21-3x-7

We move all terms to the left:

7-9x-12-(21-3x-7)=0

We add all the numbers together, and all the variables

-9x-(-3x+14)+7-12=0

We add all the numbers together, and all the variables

-9x-(-3x+14)-5=0

We get rid of parentheses

-9x+3x-14-5=0

We add all the numbers together, and all the variables

-6x-19=0

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

-6x=19

x=19/-6

x=-3+1/6

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