137.8=3.14*D

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Solution for 137.8=3.14*D equation: 


Simplifying
137.8 = 3.14D

Solving
137.8 = 3.14D

Solving for variable 'D'.

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

Add '-3.14D' to each side of the equation.
137.8 + -3.14D = 3.14D + -3.14D

Combine like terms: 3.14D + -3.14D = 0.00
137.8 + -3.14D = 0.00

Add '-137.8' to each side of the equation.
137.8 + -137.8 + -3.14D = 0.00 + -137.8

Combine like terms: 137.8 + -137.8 = 0.0
0.0 + -3.14D = 0.00 + -137.8
-3.14D = 0.00 + -137.8

Combine like terms: 0.00 + -137.8 = -137.8
-3.14D = -137.8

Divide each side by '-3.14'.
D = 43.88535032

Simplifying
D = 43.88535032

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