7(3d+4)=91

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Solution for 7(3d+4)=91 equation:


7(3d+4)=91

We simplify the equation to the form, which is simple to understand 
7(3d+4)=91

Reorder the terms in parentheses
+(+21d+28)=91

Remove unnecessary parentheses
+21d+28=+91

We move all terms containing d to the left and all other terms to the right. 
+21d=+91-28

We simplify left and right side of the equation. 
+21d=+63

We divide both sides of the equation by 21 to get d. 
d=3

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