12d-15-7d=18-6d

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Solution for 12d-15-7d=18-6d equation:


Simplifying
12d + -15 + -7d = 18 + -6d

Reorder the terms:
-15 + 12d + -7d = 18 + -6d

Combine like terms: 12d + -7d = 5d
-15 + 5d = 18 + -6d

Solving
-15 + 5d = 18 + -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 + 5d + 6d = 18 + -6d + 6d

Combine like terms: 5d + 6d = 11d
-15 + 11d = 18 + -6d + 6d

Combine like terms: -6d + 6d = 0
-15 + 11d = 18 + 0
-15 + 11d = 18

Add '15' to each side of the equation.
-15 + 15 + 11d = 18 + 15

Combine like terms: -15 + 15 = 0
0 + 11d = 18 + 15
11d = 18 + 15

Combine like terms: 18 + 15 = 33
11d = 33

Divide each side by '11'.
d = 3

Simplifying
d = 3

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