5(k-3)=90

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



5(k-3)=90

We move all terms to the left:

5(k-3)-(90)=0

We multiply parentheses

5k-15-90=0

We add all the numbers together, and all the variables

5k-105=0

We move all terms containing k to the left, all other terms to the right

5k=105

k=105/5

k=21

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