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-5x-42=2(4x+5)
We move all terms to the left:
-5x-42-(2(4x+5))=0
We calculate terms in parentheses: -(2(4x+5)), so:We get rid of parentheses
2(4x+5)
We multiply parentheses
8x+10
Back to the equation:
-(8x+10)
-5x-8x-10-42=0
We add all the numbers together, and all the variables
-13x-52=0
We move all terms containing x to the left, all other terms to the right
-13x=52
x=52/-13
x=-4
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