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234=-9(7k+2)
We move all terms to the left:
234-(-9(7k+2))=0
We calculate terms in parentheses: -(-9(7k+2)), so:We get rid of parentheses
-9(7k+2)
We multiply parentheses
-63k-18
Back to the equation:
-(-63k-18)
63k+18+234=0
We add all the numbers together, and all the variables
63k+252=0
We move all terms containing k to the left, all other terms to the right
63k=-252
k=-252/63
k=-4
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