d-(-21)=-3

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Solution for d-(-21)=-3 equation: 


Simplifying
d + -1(-21) = -3

Multiply -1 * -21
d + 21 = -3

Reorder the terms:
21 + d = -3

Solving
21 + d = -3

Solving for variable 'd'.

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

Add '-21' to each side of the equation.
21 + -21 + d = -3 + -21

Combine like terms: 21 + -21 = 0
0 + d = -3 + -21
d = -3 + -21

Combine like terms: -3 + -21 = -24
d = -24

Simplifying
d = -24

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