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5x+6x=-3x+12
We move all terms to the left:
5x+6x-(-3x+12)=0
We add all the numbers together, and all the variables
11x-(-3x+12)=0
We get rid of parentheses
11x+3x-12=0
We add all the numbers together, and all the variables
14x-12=0
We move all terms containing x to the left, all other terms to the right
14x=12
x=12/14
x=6/7
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