7x-12=2x+8x=4

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Solution for 7x-12=2x+8x=4 equation: 



7x-12=2x+8x=4

We move all terms to the left:

7x-12-(2x+8x)=0

We add all the numbers together, and all the variables

7x-(+10x)-12=0

We get rid of parentheses

7x-10x-12=0

We add all the numbers together, and all the variables

-3x-12=0

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

-3x=12

x=12/-3

x=-4

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