-21=-d+2

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Solution for -21=-d+2 equation:


Simplifying
-21 = -1d + 2

Reorder the terms:
-21 = 2 + -1d

Solving
-21 = 2 + -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.
-21 + d = 2 + -1d + d

Combine like terms: -1d + d = 0
-21 + d = 2 + 0
-21 + d = 2

Add '21' to each side of the equation.
-21 + 21 + d = 2 + 21

Combine like terms: -21 + 21 = 0
0 + d = 2 + 21
d = 2 + 21

Combine like terms: 2 + 21 = 23
d = 23

Simplifying
d = 23

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