-90=-5(3+3k)

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Solution for -90=-5(3+3k) equation:



-90=-5(3+3k)
We move all terms to the left:
-90-(-5(3+3k))=0
We add all the numbers together, and all the variables
-(-5(3k+3))-90=0
We calculate terms in parentheses: -(-5(3k+3)), so:
-5(3k+3)
We multiply parentheses
-15k-15
Back to the equation:
-(-15k-15)
We get rid of parentheses
15k+15-90=0
We add all the numbers together, and all the variables
15k-75=0
We move all terms containing k to the left, all other terms to the right
15k=75
k=75/15
k=5

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