15d-6d-9d+4d-d-3=18

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Solution for 15d-6d-9d+4d-d-3=18 equation:


Simplifying
15d + -6d + -9d + 4d + -1d + -3 = 18

Reorder the terms:
-3 + 15d + -6d + -9d + 4d + -1d = 18

Combine like terms: 15d + -6d = 9d
-3 + 9d + -9d + 4d + -1d = 18

Combine like terms: 9d + -9d = 0
-3 + 0 + 4d + -1d = 18
-3 + 4d + -1d = 18

Combine like terms: 4d + -1d = 3d
-3 + 3d = 18

Solving
-3 + 3d = 18

Solving for variable 'd'.

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

Add '3' to each side of the equation.
-3 + 3 + 3d = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 3d = 18 + 3
3d = 18 + 3

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

Divide each side by '3'.
d = 7

Simplifying
d = 7

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