-20+d=20-d

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Solution for -20+d=20-d equation:


Simplifying
-20 + d = 20 + -1d

Solving
-20 + d = 20 + -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.
-20 + d + d = 20 + -1d + d

Combine like terms: d + d = 2d
-20 + 2d = 20 + -1d + d

Combine like terms: -1d + d = 0
-20 + 2d = 20 + 0
-20 + 2d = 20

Add '20' to each side of the equation.
-20 + 20 + 2d = 20 + 20

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

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

Divide each side by '2'.
d = 20

Simplifying
d = 20

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