5d-2d=21

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Solution for 5d-2d=21 equation: 


Simplifying
5d + -2d = 21

Combine like terms: 5d + -2d = 3d
3d = 21

Solving
3d = 21

Solving for variable 'd'.

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

Divide each side by '3'.
d = 7

Simplifying
d = 7

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