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-42-8x=-18-2x
We move all terms to the left:
-42-8x-(-18-2x)=0
We add all the numbers together, and all the variables
-8x-(-2x-18)-42=0
We get rid of parentheses
-8x+2x+18-42=0
We add all the numbers together, and all the variables
-6x-24=0
We move all terms containing x to the left, all other terms to the right
-6x=24
x=24/-6
x=-4
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