X-3D=7

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Solution for X-3D=7 equation: 


Simplifying
X + -3D = 7

Reorder the terms:
-3D + X = 7

Solving
-3D + X = 7

Solving for variable 'D'.

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

Add '-1X' to each side of the equation.
-3D + X + -1X = 7 + -1X

Combine like terms: X + -1X = 0
-3D + 0 = 7 + -1X
-3D = 7 + -1X

Divide each side by '-3'.
D = -2.333333333 + 0.3333333333X

Simplifying
D = -2.333333333 + 0.3333333333X

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