15=d-3

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Solution for 15=d-3 equation:


Simplifying
15 = d + -3

Reorder the terms:
15 = -3 + d

Solving
15 = -3 + d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
15 + -1d = -3 + d + -1d

Combine like terms: d + -1d = 0
15 + -1d = -3 + 0
15 + -1d = -3

Add '-15' to each side of the equation.
15 + -15 + -1d = -3 + -15

Combine like terms: 15 + -15 = 0
0 + -1d = -3 + -15
-1d = -3 + -15

Combine like terms: -3 + -15 = -18
-1d = -18

Divide each side by '-1'.
d = 18

Simplifying
d = 18

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