7d-d-3d+7=4d

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Solution for 7d-d-3d+7=4d equation:


Simplifying
7d + -1d + -3d + 7 = 4d

Reorder the terms:
7 + 7d + -1d + -3d = 4d

Combine like terms: 7d + -1d = 6d
7 + 6d + -3d = 4d

Combine like terms: 6d + -3d = 3d
7 + 3d = 4d

Solving
7 + 3d = 4d

Solving for variable 'd'.

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

Add '-4d' to each side of the equation.
7 + 3d + -4d = 4d + -4d

Combine like terms: 3d + -4d = -1d
7 + -1d = 4d + -4d

Combine like terms: 4d + -4d = 0
7 + -1d = 0

Add '-7' to each side of the equation.
7 + -7 + -1d = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -1d = 0 + -7
-1d = 0 + -7

Combine like terms: 0 + -7 = -7
-1d = -7

Divide each side by '-1'.
d = 7

Simplifying
d = 7

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