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(450-2q-2q)-4q=50
We move all terms to the left:
(450-2q-2q)-4q-(50)=0
We add all the numbers together, and all the variables
(-4q+450)-4q-50=0
We add all the numbers together, and all the variables
-4q+(-4q+450)-50=0
We get rid of parentheses
-4q-4q+450-50=0
We add all the numbers together, and all the variables
-8q+400=0
We move all terms containing q to the left, all other terms to the right
-8q=-400
q=-400/-8
q=+50
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