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q/4-21=7
We move all terms to the left:
q/4-21-(7)=0
We add all the numbers together, and all the variables
q/4-28=0
We multiply all the terms by the denominator
q-28*4=0
We add all the numbers together, and all the variables
q-112=0
We move all terms containing q to the left, all other terms to the right
q=112
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