31+8d=5(2d+7)

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Solution for 31+8d=5(2d+7) equation:


Simplifying
31 + 8d = 5(2d + 7)

Reorder the terms:
31 + 8d = 5(7 + 2d)
31 + 8d = (7 * 5 + 2d * 5)
31 + 8d = (35 + 10d)

Solving
31 + 8d = 35 + 10d

Solving for variable 'd'.

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

Add '-10d' to each side of the equation.
31 + 8d + -10d = 35 + 10d + -10d

Combine like terms: 8d + -10d = -2d
31 + -2d = 35 + 10d + -10d

Combine like terms: 10d + -10d = 0
31 + -2d = 35 + 0
31 + -2d = 35

Add '-31' to each side of the equation.
31 + -31 + -2d = 35 + -31

Combine like terms: 31 + -31 = 0
0 + -2d = 35 + -31
-2d = 35 + -31

Combine like terms: 35 + -31 = 4
-2d = 4

Divide each side by '-2'.
d = -2

Simplifying
d = -2

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