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2q+3(400-q)=1050
We simplify the equation to the form, which is simple to understand
2q+3(400-q)=1050
Reorder the terms in parentheses
2q+(+1200-3q)=1050
Remove unnecessary parentheses
+2q+1200-3q=+1050
We move all terms containing q to the left and all other terms to the right.
+2q-3q=+1050-1200
We simplify left and right side of the equation.
-1q=-150
We divide both sides of the equation by -1 to get q.
q=150
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