(18+d)(7)=(14-D)(3)

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Solution for (18+d)(7)=(14-D)(3) equation:


Simplifying
(18 + d)(7) = (14 + -1D)(3)

Reorder the terms for easier multiplication:
7(18 + d) = (14 + -1D)(3)
(18 * 7 + d * 7) = (14 + -1D)(3)
(126 + 7d) = (14 + -1D)(3)

Reorder the terms for easier multiplication:
126 + 7d = 3(14 + -1D)
126 + 7d = (14 * 3 + -1D * 3)
126 + 7d = (42 + -3D)

Solving
126 + 7d = 42 + -3D

Solving for variable 'd'.

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

Add '-126' to each side of the equation.
126 + -126 + 7d = 42 + -126 + -3D

Combine like terms: 126 + -126 = 0
0 + 7d = 42 + -126 + -3D
7d = 42 + -126 + -3D

Combine like terms: 42 + -126 = -84
7d = -84 + -3D

Divide each side by '7'.
d = -12 + -0.4285714286D

Simplifying
d = -12 + -0.4285714286D

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