-21=80d

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Solution for -21=80d equation:


Simplifying
-21 = 80d

Solving
-21 = 80d

Solving for variable 'd'.

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

Add '-80d' to each side of the equation.
-21 + -80d = 80d + -80d

Combine like terms: 80d + -80d = 0
-21 + -80d = 0

Add '21' to each side of the equation.
-21 + 21 + -80d = 0 + 21

Combine like terms: -21 + 21 = 0
0 + -80d = 0 + 21
-80d = 0 + 21

Combine like terms: 0 + 21 = 21
-80d = 21

Divide each side by '-80'.
d = -0.2625

Simplifying
d = -0.2625

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