15=120+3d

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Solution for 15=120+3d equation:


Simplifying
15 = 120 + 3d

Solving
15 = 120 + 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
15 + -3d = 120 + 3d + -3d

Combine like terms: 3d + -3d = 0
15 + -3d = 120 + 0
15 + -3d = 120

Add '-15' to each side of the equation.
15 + -15 + -3d = 120 + -15

Combine like terms: 15 + -15 = 0
0 + -3d = 120 + -15
-3d = 120 + -15

Combine like terms: 120 + -15 = 105
-3d = 105

Divide each side by '-3'.
d = -35

Simplifying
d = -35

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