31=8(5d-7)

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Solution for 31=8(5d-7) equation:


Simplifying
31 = 8(5d + -7)

Reorder the terms:
31 = 8(-7 + 5d)
31 = (-7 * 8 + 5d * 8)
31 = (-56 + 40d)

Solving
31 = -56 + 40d

Solving for variable 'd'.

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

Add '-40d' to each side of the equation.
31 + -40d = -56 + 40d + -40d

Combine like terms: 40d + -40d = 0
31 + -40d = -56 + 0
31 + -40d = -56

Add '-31' to each side of the equation.
31 + -31 + -40d = -56 + -31

Combine like terms: 31 + -31 = 0
0 + -40d = -56 + -31
-40d = -56 + -31

Combine like terms: -56 + -31 = -87
-40d = -87

Divide each side by '-40'.
d = 2.175

Simplifying
d = 2.175

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