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-31+4x=-7(x-5)
We move all terms to the left:
-31+4x-(-7(x-5))=0
We calculate terms in parentheses: -(-7(x-5)), so:We get rid of parentheses
-7(x-5)
We multiply parentheses
-7x+35
Back to the equation:
-(-7x+35)
4x+7x-35-31=0
We add all the numbers together, and all the variables
11x-66=0
We move all terms containing x to the left, all other terms to the right
11x=66
x=66/11
x=6
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