42=15q-21

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Solution for 42=15q-21 equation: 



42=15q-21

We move all terms to the left:

42-(15q-21)=0

We get rid of parentheses

-15q+21+42=0

We add all the numbers together, and all the variables

-15q+63=0

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

-15q=-63

q=-63/-15

q=4+1/5

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