20+10d=-2(-d+18)

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Solution for 20+10d=-2(-d+18) equation:


Simplifying
20 + 10d = -2(-1d + 18)

Reorder the terms:
20 + 10d = -2(18 + -1d)
20 + 10d = (18 * -2 + -1d * -2)
20 + 10d = (-36 + 2d)

Solving
20 + 10d = -36 + 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.
20 + 10d + -2d = -36 + 2d + -2d

Combine like terms: 10d + -2d = 8d
20 + 8d = -36 + 2d + -2d

Combine like terms: 2d + -2d = 0
20 + 8d = -36 + 0
20 + 8d = -36

Add '-20' to each side of the equation.
20 + -20 + 8d = -36 + -20

Combine like terms: 20 + -20 = 0
0 + 8d = -36 + -20
8d = -36 + -20

Combine like terms: -36 + -20 = -56
8d = -56

Divide each side by '8'.
d = -7

Simplifying
d = -7

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