3(d+2)-7=21

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Solution for 3(d+2)-7=21 equation:


Simplifying
3(d + 2) + -7 = 21

Reorder the terms:
3(2 + d) + -7 = 21
(2 * 3 + d * 3) + -7 = 21
(6 + 3d) + -7 = 21

Reorder the terms:
6 + -7 + 3d = 21

Combine like terms: 6 + -7 = -1
-1 + 3d = 21

Solving
-1 + 3d = 21

Solving for variable 'd'.

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

Add '1' to each side of the equation.
-1 + 1 + 3d = 21 + 1

Combine like terms: -1 + 1 = 0
0 + 3d = 21 + 1
3d = 21 + 1

Combine like terms: 21 + 1 = 22
3d = 22

Divide each side by '3'.
d = 7.333333333

Simplifying
d = 7.333333333

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