(7+5)q-9=2q+21

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Solution for (7+5)q-9=2q+21 equation: 



(7+5)q-9=2q+21

We move all terms to the left:

(7+5)q-9-(2q+21)=0

We add all the numbers together, and all the variables

12q-(2q+21)-9=0

We get rid of parentheses

12q-2q-21-9=0

We add all the numbers together, and all the variables

10q-30=0

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

10q=30

q=30/10

q=3

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