18x-12=-3x+72

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Solution for 18x-12=-3x+72 equation: 



18x-12=-3x+72

We move all terms to the left:

18x-12-(-3x+72)=0

We get rid of parentheses

18x+3x-72-12=0

We add all the numbers together, and all the variables

21x-84=0

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

21x=84

x=84/21

x=4

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