30=10(q-90)

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Solution for 30=10(q-90) equation: 



30=10(q-90)

We move all terms to the left:

30-(10(q-90))=0



We calculate terms in parentheses: -(10(q-90)), so:

10(q-90)

We multiply parentheses

10q-900

Back to the equation:

-(10q-900)



We get rid of parentheses

-10q+900+30=0

We add all the numbers together, and all the variables

-10q+930=0

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

-10q=-930

q=-930/-10

q=+93

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