7g-9g=-18

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Solution for 7g-9g=-18 equation: 



7g-9g=-18

We move all terms to the left:

7g-9g-(-18)=0

We add all the numbers together, and all the variables

-2g+18=0

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

-2g=-18

g=-18/-2

g=+9

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