8d=5d+21

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Solution for 8d=5d+21 equation: 


Simplifying
8d = 5d + 21

Reorder the terms:
8d = 21 + 5d

Solving
8d = 21 + 5d

Solving for variable 'd'.

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

Add '-5d' to each side of the equation.
8d + -5d = 21 + 5d + -5d

Combine like terms: 8d + -5d = 3d
3d = 21 + 5d + -5d

Combine like terms: 5d + -5d = 0
3d = 21 + 0
3d = 21

Divide each side by '3'.
d = 7

Simplifying
d = 7

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