2d+18=16-(d+7)

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Solution for 2d+18=16-(d+7) equation:


Simplifying
2d + 18 = 16 + -1(d + 7)

Reorder the terms:
18 + 2d = 16 + -1(d + 7)

Reorder the terms:
18 + 2d = 16 + -1(7 + d)
18 + 2d = 16 + (7 * -1 + d * -1)
18 + 2d = 16 + (-7 + -1d)

Combine like terms: 16 + -7 = 9
18 + 2d = 9 + -1d

Solving
18 + 2d = 9 + -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 + 2d + d = 9 + -1d + d

Combine like terms: 2d + d = 3d
18 + 3d = 9 + -1d + d

Combine like terms: -1d + d = 0
18 + 3d = 9 + 0
18 + 3d = 9

Add '-18' to each side of the equation.
18 + -18 + 3d = 9 + -18

Combine like terms: 18 + -18 = 0
0 + 3d = 9 + -18
3d = 9 + -18

Combine like terms: 9 + -18 = -9
3d = -9

Divide each side by '3'.
d = -3

Simplifying
d = -3

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