7d+7=3d+31

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Solution for 7d+7=3d+31 equation:


Simplifying
7d + 7 = 3d + 31

Reorder the terms:
7 + 7d = 3d + 31

Reorder the terms:
7 + 7d = 31 + 3d

Solving
7 + 7d = 31 + 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
7 + 7d + -3d = 31 + 3d + -3d

Combine like terms: 7d + -3d = 4d
7 + 4d = 31 + 3d + -3d

Combine like terms: 3d + -3d = 0
7 + 4d = 31 + 0
7 + 4d = 31

Add '-7' to each side of the equation.
7 + -7 + 4d = 31 + -7

Combine like terms: 7 + -7 = 0
0 + 4d = 31 + -7
4d = 31 + -7

Combine like terms: 31 + -7 = 24
4d = 24

Divide each side by '4'.
d = 6

Simplifying
d = 6

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