-4(-4d-5)=5+21d

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Solution for -4(-4d-5)=5+21d equation:


Simplifying
-4(-4d + -5) = 5 + 21d

Reorder the terms:
-4(-5 + -4d) = 5 + 21d
(-5 * -4 + -4d * -4) = 5 + 21d
(20 + 16d) = 5 + 21d

Solving
20 + 16d = 5 + 21d

Solving for variable 'd'.

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

Add '-21d' to each side of the equation.
20 + 16d + -21d = 5 + 21d + -21d

Combine like terms: 16d + -21d = -5d
20 + -5d = 5 + 21d + -21d

Combine like terms: 21d + -21d = 0
20 + -5d = 5 + 0
20 + -5d = 5

Add '-20' to each side of the equation.
20 + -20 + -5d = 5 + -20

Combine like terms: 20 + -20 = 0
0 + -5d = 5 + -20
-5d = 5 + -20

Combine like terms: 5 + -20 = -15
-5d = -15

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

Simplifying
d = 3

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