12+3+-9d=12+-6d

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Solution for 12+3+-9d=12+-6d equation:


Simplifying
12 + 3 + -9d = 12 + -6d

Combine like terms: 12 + 3 = 15
15 + -9d = 12 + -6d

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

Solving for variable 'd'.

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

Add '6d' to each side of the equation.
15 + -9d + 6d = 12 + -6d + 6d

Combine like terms: -9d + 6d = -3d
15 + -3d = 12 + -6d + 6d

Combine like terms: -6d + 6d = 0
15 + -3d = 12 + 0
15 + -3d = 12

Add '-15' to each side of the equation.
15 + -15 + -3d = 12 + -15

Combine like terms: 15 + -15 = 0
0 + -3d = 12 + -15
-3d = 12 + -15

Combine like terms: 12 + -15 = -3
-3d = -3

Divide each side by '-3'.
d = 1

Simplifying
d = 1

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