-21d+15+5d=7

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Solution for -21d+15+5d=7 equation:


Simplifying
-21d + 15 + 5d = 7

Reorder the terms:
15 + -21d + 5d = 7

Combine like terms: -21d + 5d = -16d
15 + -16d = 7

Solving
15 + -16d = 7

Solving for variable 'd'.

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

Add '-15' to each side of the equation.
15 + -15 + -16d = 7 + -15

Combine like terms: 15 + -15 = 0
0 + -16d = 7 + -15
-16d = 7 + -15

Combine like terms: 7 + -15 = -8
-16d = -8

Divide each side by '-16'.
d = 0.5

Simplifying
d = 0.5

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