400=10d

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Solution for 400=10d equation:


Simplifying
400 = 10d

Solving
400 = 10d

Solving for variable 'd'.

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

Add '-10d' to each side of the equation.
400 + -10d = 10d + -10d

Combine like terms: 10d + -10d = 0
400 + -10d = 0

Add '-400' to each side of the equation.
400 + -400 + -10d = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -10d = 0 + -400
-10d = 0 + -400

Combine like terms: 0 + -400 = -400
-10d = -400

Divide each side by '-10'.
d = 40

Simplifying
d = 40

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