20-(2d-2)=40

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Solution for 20-(2d-2)=40 equation:


Simplifying
20 + -1(2d + -2) = 40

Reorder the terms:
20 + -1(-2 + 2d) = 40
20 + (-2 * -1 + 2d * -1) = 40
20 + (2 + -2d) = 40

Combine like terms: 20 + 2 = 22
22 + -2d = 40

Solving
22 + -2d = 40

Solving for variable 'd'.

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

Add '-22' to each side of the equation.
22 + -22 + -2d = 40 + -22

Combine like terms: 22 + -22 = 0
0 + -2d = 40 + -22
-2d = 40 + -22

Combine like terms: 40 + -22 = 18
-2d = 18

Divide each side by '-2'.
d = -9

Simplifying
d = -9

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