d-1=15-3d-d

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Solution for d-1=15-3d-d equation:


Simplifying
d + -1 = 15 + -3d + -1d

Reorder the terms:
-1 + d = 15 + -3d + -1d

Combine like terms: -3d + -1d = -4d
-1 + d = 15 + -4d

Solving
-1 + d = 15 + -4d

Solving for variable 'd'.

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

Add '4d' to each side of the equation.
-1 + d + 4d = 15 + -4d + 4d

Combine like terms: d + 4d = 5d
-1 + 5d = 15 + -4d + 4d

Combine like terms: -4d + 4d = 0
-1 + 5d = 15 + 0
-1 + 5d = 15

Add '1' to each side of the equation.
-1 + 1 + 5d = 15 + 1

Combine like terms: -1 + 1 = 0
0 + 5d = 15 + 1
5d = 15 + 1

Combine like terms: 15 + 1 = 16
5d = 16

Divide each side by '5'.
d = 3.2

Simplifying
d = 3.2

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