12=d+3d-2d

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


Simplifying
12 = d + 3d + -2d

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

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

Solving
12 = 2d

Solving for variable 'd'.

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

Add '-2d' to each side of the equation.
12 + -2d = 2d + -2d

Combine like terms: 2d + -2d = 0
12 + -2d = 0

Add '-12' to each side of the equation.
12 + -12 + -2d = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -2d = 0 + -12
-2d = 0 + -12

Combine like terms: 0 + -12 = -12
-2d = -12

Divide each side by '-2'.
d = 6

Simplifying
d = 6

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