x+3+2x+12=4x-30

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Solution for x+3+2x+12=4x-30 equation: 



x+3+2x+12=4x-30

We move all terms to the left:

x+3+2x+12-(4x-30)=0

We add all the numbers together, and all the variables

3x-(4x-30)+15=0

We get rid of parentheses

3x-4x+30+15=0

We add all the numbers together, and all the variables

-1x+45=0

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

-x=-45

x=-45/-1

x=+45

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