20d-40=400

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Solution for 20d-40=400 equation: 


Simplifying
20d + -40 = 400

Reorder the terms:
-40 + 20d = 400

Solving
-40 + 20d = 400

Solving for variable 'd'.

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

Add '40' to each side of the equation.
-40 + 40 + 20d = 400 + 40

Combine like terms: -40 + 40 = 0
0 + 20d = 400 + 40
20d = 400 + 40

Combine like terms: 400 + 40 = 440
20d = 440

Divide each side by '20'.
d = 22

Simplifying
d = 22

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