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50=4(5-k)
We move all terms to the left:
50-(4(5-k))=0
We add all the numbers together, and all the variables
-(4(-1k+5))+50=0
We calculate terms in parentheses: -(4(-1k+5)), so:We get rid of parentheses
4(-1k+5)
We multiply parentheses
-4k+20
Back to the equation:
-(-4k+20)
4k-20+50=0
We add all the numbers together, and all the variables
4k+30=0
We move all terms containing k to the left, all other terms to the right
4k=-30
k=-30/4
k=-7+1/2
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