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10k-7=2(12-5k)
We move all terms to the left:
10k-7-(2(12-5k))=0
We add all the numbers together, and all the variables
10k-(2(-5k+12))-7=0
We calculate terms in parentheses: -(2(-5k+12)), so:We get rid of parentheses
2(-5k+12)
We multiply parentheses
-10k+24
Back to the equation:
-(-10k+24)
10k+10k-24-7=0
We add all the numbers together, and all the variables
20k-31=0
We move all terms containing k to the left, all other terms to the right
20k=31
k=31/20
k=1+11/20
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