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3x=-42-11x
We move all terms to the left:
3x-(-42-11x)=0
We add all the numbers together, and all the variables
3x-(-11x-42)=0
We get rid of parentheses
3x+11x+42=0
We add all the numbers together, and all the variables
14x+42=0
We move all terms containing x to the left, all other terms to the right
14x=-42
x=-42/14
x=-3
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