x+12=4x-7=90

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Solution for x+12=4x-7=90 equation: 



x+12=4x-7=90

We move all terms to the left:

x+12-(4x-7)=0

We get rid of parentheses

x-4x+7+12=0

We add all the numbers together, and all the variables

-3x+19=0

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

-3x=-19

x=-19/-3

x=6+1/3

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