15=-3(q-7)

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Solution for 15=-3(q-7) equation: 



15=-3(q-7)

We move all terms to the left:

15-(-3(q-7))=0



We calculate terms in parentheses: -(-3(q-7)), so:

-3(q-7)

We multiply parentheses

-3q+21

Back to the equation:

-(-3q+21)



We get rid of parentheses

3q-21+15=0

We add all the numbers together, and all the variables

3q-6=0

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

3q=6

q=6/3

q=2

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