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2*(0.5*15*a)=0.5*(15+15-a)*15
We simplify the equation to the form, which is simple to understand
2*(0.5*15*a)=0.5*(15+15-a)*15
Simplifying:
2*(+7.5*a)=0.5*(15+15-a)*15
Simplifying:
2*(+7.5a)=0.5*(15+15-a)*15
Simplifying terms in parentheses
2*(+7.5a)=0.5*(+30-1a)*15
Reorder the terms in parentheses
+(+15a)=0.5*(+30-1a)*15
Remove unnecessary parentheses
+15a=0.5+*(+30-1a+)+*15
Reorder the terms in parentheses
+15a=+(+15-0.5a)*15
Reorder the terms in parentheses
+15a=+(+225-7.5a)
Remove unnecessary parentheses
+15a=+225-7.5a
We move all terms containing a to the left and all other terms to the right.
+15a+7.5a=+225
We simplify left and right side of the equation.
+22.5a=+225
We divide both sides of the equation by 22.5 to get a.
a=10
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