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x+12x=5x-3
We move all terms to the left:
x+12x-(5x-3)=0
We add all the numbers together, and all the variables
13x-(5x-3)=0
We get rid of parentheses
13x-5x+3=0
We add all the numbers together, and all the variables
8x+3=0
We move all terms containing x to the left, all other terms to the right
8x=-3
x=-3/8
x=-3/8
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