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-7+c/9=30
We move all terms to the left:
-7+c/9-(30)=0
We add all the numbers together, and all the variables
c/9-37=0
We multiply all the terms by the denominator
c-37*9=0
We add all the numbers together, and all the variables
c-333=0
We move all terms containing c to the left, all other terms to the right
c=333
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