d+2d+4d=56

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Solution for d+2d+4d=56 equation: 


Simplifying
d + 2d + 4d = 56

Combine like terms: d + 2d = 3d
3d + 4d = 56

Combine like terms: 3d + 4d = 7d
7d = 56

Solving
7d = 56

Solving for variable 'd'.

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

Divide each side by '7'.
d = 8

Simplifying
d = 8

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