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-14-7k=-7(5k+6)
We move all terms to the left:
-14-7k-(-7(5k+6))=0
We calculate terms in parentheses: -(-7(5k+6)), so:We get rid of parentheses
-7(5k+6)
We multiply parentheses
-35k-42
Back to the equation:
-(-35k-42)
-7k+35k+42-14=0
We add all the numbers together, and all the variables
28k+28=0
We move all terms containing k to the left, all other terms to the right
28k=-28
k=-28/28
k=-1
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