7d-3d=28

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Solution for 7d-3d=28 equation: 


Simplifying
7d + -3d = 28

Combine like terms: 7d + -3d = 4d
4d = 28

Solving
4d = 28

Solving for variable 'd'.

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

Divide each side by '4'.
d = 7

Simplifying
d = 7

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