90=4x+12

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Solution for 90=4x+12 equation: 



90=4x+12

We move all terms to the left:

90-(4x+12)=0

We get rid of parentheses

-4x-12+90=0

We add all the numbers together, and all the variables

-4x+78=0

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

-4x=-78

x=-78/-4

x=19+1/2

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