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50=-5(q-4)
We move all terms to the left:
50-(-5(q-4))=0
We calculate terms in parentheses: -(-5(q-4)), so:We get rid of parentheses
-5(q-4)
We multiply parentheses
-5q+20
Back to the equation:
-(-5q+20)
5q-20+50=0
We add all the numbers together, and all the variables
5q+30=0
We move all terms containing q to the left, all other terms to the right
5q=-30
q=-30/5
q=-6
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