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15+12x=-8-6x
We move all terms to the left:
15+12x-(-8-6x)=0
We add all the numbers together, and all the variables
12x-(-6x-8)+15=0
We get rid of parentheses
12x+6x+8+15=0
We add all the numbers together, and all the variables
18x+23=0
We move all terms containing x to the left, all other terms to the right
18x=-23
x=-23/18
x=-1+5/18
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