d+3d-2d+d+3d=12

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Solution for d+3d-2d+d+3d=12 equation: 


Simplifying
d + 3d + -2d + d + 3d = 12

Combine like terms: d + 3d = 4d
4d + -2d + d + 3d = 12

Combine like terms: 4d + -2d = 2d
2d + d + 3d = 12

Combine like terms: 2d + d = 3d
3d + 3d = 12

Combine like terms: 3d + 3d = 6d
6d = 12

Solving
6d = 12

Solving for variable 'd'.

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

Divide each side by '6'.
d = 2

Simplifying
d = 2

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