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-10=-2k+6(2k-10)-30
We move all terms to the left:
-10-(-2k+6(2k-10)-30)=0
We calculate terms in parentheses: -(-2k+6(2k-10)-30), so:We get rid of parentheses
-2k+6(2k-10)-30
We multiply parentheses
-2k+12k-60-30
We add all the numbers together, and all the variables
10k-90
Back to the equation:
-(10k-90)
-10k+90-10=0
We add all the numbers together, and all the variables
-10k+80=0
We move all terms containing k to the left, all other terms to the right
-10k=-80
k=-80/-10
k=+8
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