40q-30=20q-90

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Solution for 40q-30=20q-90 equation: 



40q-30=20q-90

We move all terms to the left:

40q-30-(20q-90)=0

We get rid of parentheses

40q-20q+90-30=0

We add all the numbers together, and all the variables

20q+60=0

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

20q=-60

q=-60/20

q=-3

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