15=-8d-(-7)

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Solution for 15=-8d-(-7) equation:


Simplifying
15 = -8d + -1(-7)

Multiply -1 * -7
15 = -8d + 7

Reorder the terms:
15 = 7 + -8d

Solving
15 = 7 + -8d

Solving for variable 'd'.

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

Add '8d' to each side of the equation.
15 + 8d = 7 + -8d + 8d

Combine like terms: -8d + 8d = 0
15 + 8d = 7 + 0
15 + 8d = 7

Add '-15' to each side of the equation.
15 + -15 + 8d = 7 + -15

Combine like terms: 15 + -15 = 0
0 + 8d = 7 + -15
8d = 7 + -15

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

Divide each side by '8'.
d = -1

Simplifying
d = -1

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