8-d-15=3d+15

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Solution for 8-d-15=3d+15 equation:


Simplifying
8 + -1d + -15 = 3d + 15

Reorder the terms:
8 + -15 + -1d = 3d + 15

Combine like terms: 8 + -15 = -7
-7 + -1d = 3d + 15

Reorder the terms:
-7 + -1d = 15 + 3d

Solving
-7 + -1d = 15 + 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
-7 + -1d + -3d = 15 + 3d + -3d

Combine like terms: -1d + -3d = -4d
-7 + -4d = 15 + 3d + -3d

Combine like terms: 3d + -3d = 0
-7 + -4d = 15 + 0
-7 + -4d = 15

Add '7' to each side of the equation.
-7 + 7 + -4d = 15 + 7

Combine like terms: -7 + 7 = 0
0 + -4d = 15 + 7
-4d = 15 + 7

Combine like terms: 15 + 7 = 22
-4d = 22

Divide each side by '-4'.
d = -5.5

Simplifying
d = -5.5

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