12-3d=18

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Solution for 12-3d=18 equation: 


Simplifying
12 + -3d = 18

Solving
12 + -3d = 18

Solving for variable 'd'.

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

Add '-12' to each side of the equation.
12 + -12 + -3d = 18 + -12

Combine like terms: 12 + -12 = 0
0 + -3d = 18 + -12
-3d = 18 + -12

Combine like terms: 18 + -12 = 6
-3d = 6

Divide each side by '-3'.
d = -2

Simplifying
d = -2

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