8d+9=4d-7

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


Simplifying
8d + 9 = 4d + -7

Reorder the terms:
9 + 8d = 4d + -7

Reorder the terms:
9 + 8d = -7 + 4d

Solving
9 + 8d = -7 + 4d

Solving for variable 'd'.

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

Add '-4d' to each side of the equation.
9 + 8d + -4d = -7 + 4d + -4d

Combine like terms: 8d + -4d = 4d
9 + 4d = -7 + 4d + -4d

Combine like terms: 4d + -4d = 0
9 + 4d = -7 + 0
9 + 4d = -7

Add '-9' to each side of the equation.
9 + -9 + 4d = -7 + -9

Combine like terms: 9 + -9 = 0
0 + 4d = -7 + -9
4d = -7 + -9

Combine like terms: -7 + -9 = -16
4d = -16

Divide each side by '4'.
d = -4

Simplifying
d = -4

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