-4d+6-d=21

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Solution for -4d+6-d=21 equation:


Simplifying
-4d + 6 + -1d = 21

Reorder the terms:
6 + -4d + -1d = 21

Combine like terms: -4d + -1d = -5d
6 + -5d = 21

Solving
6 + -5d = 21

Solving for variable 'd'.

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

Add '-6' to each side of the equation.
6 + -6 + -5d = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -5d = 21 + -6
-5d = 21 + -6

Combine like terms: 21 + -6 = 15
-5d = 15

Divide each side by '-5'.
d = -3

Simplifying
d = -3

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