10(d)+5(21-d)=165

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Solution for 10(d)+5(21-d)=165 equation:


10(d)+5(21-d)=165

We simplify the equation to the form, which is simple to understand 
10(d)+5(21-d)=165

Reorder the terms in parentheses
+(+10d)+5*(21-d)=165

Remove unnecessary parentheses
+10d+5+*(+21-d+)=+165

Reorder the terms in parentheses
+10d+(+105-5d)=165

Remove unnecessary parentheses
+10d+105-5d=+165

We move all terms containing d to the left and all other terms to the right. 
+10d-5d=+165-105

We simplify left and right side of the equation. 
+5d=+60

We divide both sides of the equation by 5 to get d. 
d=12

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