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36+7k=4(4+3k)
We move all terms to the left:
36+7k-(4(4+3k))=0
We add all the numbers together, and all the variables
7k-(4(3k+4))+36=0
We calculate terms in parentheses: -(4(3k+4)), so:We get rid of parentheses
4(3k+4)
We multiply parentheses
12k+16
Back to the equation:
-(12k+16)
7k-12k-16+36=0
We add all the numbers together, and all the variables
-5k+20=0
We move all terms containing k to the left, all other terms to the right
-5k=-20
k=-20/-5
k=+4
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