12d+7=6d+31

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Solution for 12d+7=6d+31 equation:


Simplifying
12d + 7 = 6d + 31

Reorder the terms:
7 + 12d = 6d + 31

Reorder the terms:
7 + 12d = 31 + 6d

Solving
7 + 12d = 31 + 6d

Solving for variable 'd'.

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

Add '-6d' to each side of the equation.
7 + 12d + -6d = 31 + 6d + -6d

Combine like terms: 12d + -6d = 6d
7 + 6d = 31 + 6d + -6d

Combine like terms: 6d + -6d = 0
7 + 6d = 31 + 0
7 + 6d = 31

Add '-7' to each side of the equation.
7 + -7 + 6d = 31 + -7

Combine like terms: 7 + -7 = 0
0 + 6d = 31 + -7
6d = 31 + -7

Combine like terms: 31 + -7 = 24
6d = 24

Divide each side by '6'.
d = 4

Simplifying
d = 4

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