3d+9=2d+15

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Solution for 3d+9=2d+15 equation:


Simplifying
3d + 9 = 2d + 15

Reorder the terms:
9 + 3d = 2d + 15

Reorder the terms:
9 + 3d = 15 + 2d

Solving
9 + 3d = 15 + 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.
9 + 3d + -2d = 15 + 2d + -2d

Combine like terms: 3d + -2d = 1d
9 + 1d = 15 + 2d + -2d

Combine like terms: 2d + -2d = 0
9 + 1d = 15 + 0
9 + 1d = 15

Add '-9' to each side of the equation.
9 + -9 + 1d = 15 + -9

Combine like terms: 9 + -9 = 0
0 + 1d = 15 + -9
1d = 15 + -9

Combine like terms: 15 + -9 = 6
1d = 6

Divide each side by '1'.
d = 6

Simplifying
d = 6

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