d-20=-30

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Solution for d-20=-30 equation: 


Simplifying
d + -20 = -30

Reorder the terms:
-20 + d = -30

Solving
-20 + d = -30

Solving for variable 'd'.

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

Add '20' to each side of the equation.
-20 + 20 + d = -30 + 20

Combine like terms: -20 + 20 = 0
0 + d = -30 + 20
d = -30 + 20

Combine like terms: -30 + 20 = -10
d = -10

Simplifying
d = -10

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