18x+12=-3x+9

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Solution for 18x+12=-3x+9 equation: 



18x+12=-3x+9

We move all terms to the left:

18x+12-(-3x+9)=0

We get rid of parentheses

18x+3x-9+12=0

We add all the numbers together, and all the variables

21x+3=0

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

21x=-3

x=-3/21

x=-1/7

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