12d+7=8d+31

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Solution for 12d+7=8d+31 equation:


Simplifying
12d + 7 = 8d + 31

Reorder the terms:
7 + 12d = 8d + 31

Reorder the terms:
7 + 12d = 31 + 8d

Solving
7 + 12d = 31 + 8d

Solving for variable 'd'.

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

Add '-8d' to each side of the equation.
7 + 12d + -8d = 31 + 8d + -8d

Combine like terms: 12d + -8d = 4d
7 + 4d = 31 + 8d + -8d

Combine like terms: 8d + -8d = 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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