3x-12+7x=18+20x

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Solution for 3x-12+7x=18+20x equation: 



3x-12+7x=18+20x

We move all terms to the left:

3x-12+7x-(18+20x)=0

We add all the numbers together, and all the variables

3x+7x-(20x+18)-12=0

We add all the numbers together, and all the variables

10x-(20x+18)-12=0

We get rid of parentheses

10x-20x-18-12=0

We add all the numbers together, and all the variables

-10x-30=0

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

-10x=30

x=30/-10

x=-3

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