-9d-12d-6=15

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Solution for -9d-12d-6=15 equation:


Simplifying
-9d + -12d + -6 = 15

Reorder the terms:
-6 + -9d + -12d = 15

Combine like terms: -9d + -12d = -21d
-6 + -21d = 15

Solving
-6 + -21d = 15

Solving for variable 'd'.

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

Add '6' to each side of the equation.
-6 + 6 + -21d = 15 + 6

Combine like terms: -6 + 6 = 0
0 + -21d = 15 + 6
-21d = 15 + 6

Combine like terms: 15 + 6 = 21
-21d = 21

Divide each side by '-21'.
d = -1

Simplifying
d = -1

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