3(d+7)=81

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Solution for 3(d+7)=81 equation: 


Simplifying
3(d + 7) = 81

Reorder the terms:
3(7 + d) = 81
(7 * 3 + d * 3) = 81
(21 + 3d) = 81

Solving
21 + 3d = 81

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + 3d = 81 + -21

Combine like terms: 21 + -21 = 0
0 + 3d = 81 + -21
3d = 81 + -21

Combine like terms: 81 + -21 = 60
3d = 60

Divide each side by '3'.
d = 20

Simplifying
d = 20

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