-q=4+9

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Solution for -q=4+9 equation: 



-q=4+9

We move all terms to the left:

-q-(4+9)=0

We add all the numbers together, and all the variables

-q-13=0

We add all the numbers together, and all the variables

-1q-13=0

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

-q=13

q=13/-1

q=-13

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