7=15-q

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Solution for 7=15-q equation: 



7=15-q

We move all terms to the left:

7-(15-q)=0

We add all the numbers together, and all the variables

-(-1q+15)+7=0

We get rid of parentheses

1q-15+7=0

We add all the numbers together, and all the variables

q-8=0

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

q=8

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