18-21=15d+3

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Solution for 18-21=15d+3 equation:


Simplifying
18 + -21 = 15d + 3

Combine like terms: 18 + -21 = -3
-3 = 15d + 3

Reorder the terms:
-3 = 3 + 15d

Solving
-3 = 3 + 15d

Solving for variable 'd'.

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

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

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

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

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

Combine like terms: 3 + 3 = 6
-15d = 6

Divide each side by '-15'.
d = -0.4

Simplifying
d = -0.4

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