3x+90=12x

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Solution for 3x+90=12x equation: 



3x+90=12x

We move all terms to the left:

3x+90-(12x)=0

We add all the numbers together, and all the variables

-9x+90=0

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

-9x=-90

x=-90/-9

x=+10

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