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0.90=q/10(20-50)
We move all terms to the left:
0.90-(q/10(20-50))=0
We add all the numbers together, and all the variables
-(q/10(-30))+0.90=0
We add all the numbers together, and all the variables
-(q/10(-30))+0.9=0
We multiply all the terms by the denominator
-(q+(0.9)*10(-30))=0
We calculate terms in parentheses: -(q+(0.9)*10(-30)), so:We get rid of parentheses
q+(0.9)*10(-30)
We add all the numbers together, and all the variables
q-270
Back to the equation:
-(q-270)
-q+270=0
We add all the numbers together, and all the variables
-1q+270=0
We move all terms containing q to the left, all other terms to the right
-q=-270
q=-270/-1
q=+270
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