-31+8d=4(9d+7)

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Solution for -31+8d=4(9d+7) equation:


Simplifying
-31 + 8d = 4(9d + 7)

Reorder the terms:
-31 + 8d = 4(7 + 9d)
-31 + 8d = (7 * 4 + 9d * 4)
-31 + 8d = (28 + 36d)

Solving
-31 + 8d = 28 + 36d

Solving for variable 'd'.

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

Add '-36d' to each side of the equation.
-31 + 8d + -36d = 28 + 36d + -36d

Combine like terms: 8d + -36d = -28d
-31 + -28d = 28 + 36d + -36d

Combine like terms: 36d + -36d = 0
-31 + -28d = 28 + 0
-31 + -28d = 28

Add '31' to each side of the equation.
-31 + 31 + -28d = 28 + 31

Combine like terms: -31 + 31 = 0
0 + -28d = 28 + 31
-28d = 28 + 31

Combine like terms: 28 + 31 = 59
-28d = 59

Divide each side by '-28'.
d = -2.107142857

Simplifying
d = -2.107142857

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