9d-12-8=7

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Solution for 9d-12-8=7 equation: 


Simplifying
9d + -12 + -8 = 7

Reorder the terms:
-12 + -8 + 9d = 7

Combine like terms: -12 + -8 = -20
-20 + 9d = 7

Solving
-20 + 9d = 7

Solving for variable 'd'.

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

Add '20' to each side of the equation.
-20 + 20 + 9d = 7 + 20

Combine like terms: -20 + 20 = 0
0 + 9d = 7 + 20
9d = 7 + 20

Combine like terms: 7 + 20 = 27
9d = 27

Divide each side by '9'.
d = 3

Simplifying
d = 3

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