12-18+8d=9d-20

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Solution for 12-18+8d=9d-20 equation:


Simplifying
12 + -18 + 8d = 9d + -20

Combine like terms: 12 + -18 = -6
-6 + 8d = 9d + -20

Reorder the terms:
-6 + 8d = -20 + 9d

Solving
-6 + 8d = -20 + 9d

Solving for variable 'd'.

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

Add '-9d' to each side of the equation.
-6 + 8d + -9d = -20 + 9d + -9d

Combine like terms: 8d + -9d = -1d
-6 + -1d = -20 + 9d + -9d

Combine like terms: 9d + -9d = 0
-6 + -1d = -20 + 0
-6 + -1d = -20

Add '6' to each side of the equation.
-6 + 6 + -1d = -20 + 6

Combine like terms: -6 + 6 = 0
0 + -1d = -20 + 6
-1d = -20 + 6

Combine like terms: -20 + 6 = -14
-1d = -14

Divide each side by '-1'.
d = 14

Simplifying
d = 14

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