18=-d+9

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Solution for 18=-d+9 equation:


Simplifying
18 = -1d + 9

Reorder the terms:
18 = 9 + -1d

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

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

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

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

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

Simplifying
d = -9

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