4q+9=2q-9

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Solution for 4q+9=2q-9 equation: 



4q+9=2q-9

We move all terms to the left:

4q+9-(2q-9)=0

We get rid of parentheses

4q-2q+9+9=0

We add all the numbers together, and all the variables

2q+18=0

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

2q=-18

q=-18/2

q=-9

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