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42=-7x-6+4x
We move all terms to the left:
42-(-7x-6+4x)=0
We add all the numbers together, and all the variables
-(-3x-6)+42=0
We get rid of parentheses
3x+6+42=0
We add all the numbers together, and all the variables
3x+48=0
We move all terms containing x to the left, all other terms to the right
3x=-48
x=-48/3
x=-16
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