d+2d=120

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Solution for d+2d=120 equation: 


Simplifying
d + 2d = 120

Combine like terms: d + 2d = 3d
3d = 120

Solving
3d = 120

Solving for variable 'd'.

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

Divide each side by '3'.
d = 40

Simplifying
d = 40

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