2d-d+d-d=20

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Solution for 2d-d+d-d=20 equation: 


Simplifying
2d + -1d + d + -1d = 20

Combine like terms: 2d + -1d = 1d
1d + d + -1d = 20

Combine like terms: 1d + d = 2d
2d + -1d = 20

Combine like terms: 2d + -1d = 1d
1d = 20

Solving
1d = 20

Solving for variable 'd'.

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

Divide each side by '1'.
d = 20

Simplifying
d = 20

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