-1=d+21

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Solution for -1=d+21 equation:


Simplifying
-1 = d + 21

Reorder the terms:
-1 = 21 + d

Solving
-1 = 21 + d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
-1 + -1d = 21 + d + -1d

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

Add '1' to each side of the equation.
-1 + 1 + -1d = 21 + 1

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

Combine like terms: 21 + 1 = 22
-1d = 22

Divide each side by '-1'.
d = -22

Simplifying
d = -22

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