9=15-3q

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Solution for 9=15-3q equation: 



9=15-3q

We move all terms to the left:

9-(15-3q)=0

We add all the numbers together, and all the variables

-(-3q+15)+9=0

We get rid of parentheses

3q-15+9=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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