3d-18=-d+30

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Solution for 3d-18=-d+30 equation:


Simplifying
3d + -18 = -1d + 30

Reorder the terms:
-18 + 3d = -1d + 30

Reorder the terms:
-18 + 3d = 30 + -1d

Solving
-18 + 3d = 30 + -1d

Solving for variable 'd'.

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

Add 'd' to each side of the equation.
-18 + 3d + d = 30 + -1d + d

Combine like terms: 3d + d = 4d
-18 + 4d = 30 + -1d + d

Combine like terms: -1d + d = 0
-18 + 4d = 30 + 0
-18 + 4d = 30

Add '18' to each side of the equation.
-18 + 18 + 4d = 30 + 18

Combine like terms: -18 + 18 = 0
0 + 4d = 30 + 18
4d = 30 + 18

Combine like terms: 30 + 18 = 48
4d = 48

Divide each side by '4'.
d = 12

Simplifying
d = 12

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