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100=4(1-4k)
We move all terms to the left:
100-(4(1-4k))=0
We add all the numbers together, and all the variables
-(4(-4k+1))+100=0
We calculate terms in parentheses: -(4(-4k+1)), so:We get rid of parentheses
4(-4k+1)
We multiply parentheses
-16k+4
Back to the equation:
-(-16k+4)
16k-4+100=0
We add all the numbers together, and all the variables
16k+96=0
We move all terms containing k to the left, all other terms to the right
16k=-96
k=-96/16
k=-6
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