Solve for Q
Q=0
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620Q=800Q
Combine 120Q and 500Q to get 620Q.
620Q-800Q=0
Subtract 800Q from both sides.
-180Q=0
Combine 620Q and -800Q to get -180Q.
Q=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -180 is not equal to 0, Q must be equal to 0.
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