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-128=8(-k+7)
We move all terms to the left:
-128-(8(-k+7))=0
We add all the numbers together, and all the variables
-(8(-1k+7))-128=0
We calculate terms in parentheses: -(8(-1k+7)), so:We get rid of parentheses
8(-1k+7)
We multiply parentheses
-8k+56
Back to the equation:
-(-8k+56)
8k-56-128=0
We add all the numbers together, and all the variables
8k-184=0
We move all terms containing k to the left, all other terms to the right
8k=184
k=184/8
k=23
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