3x+12=5x=90

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Solution for 3x+12=5x=90 equation: 



3x+12=5x=90

We move all terms to the left:

3x+12-(5x)=0

We add all the numbers together, and all the variables

-2x+12=0

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

-2x=-12

x=-12/-2

x=+6

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