7d-d+4d+9-5d=0

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Solution for 7d-d+4d+9-5d=0 equation:


Simplifying
7d + -1d + 4d + 9 + -5d = 0

Reorder the terms:
9 + 7d + -1d + 4d + -5d = 0

Combine like terms: 7d + -1d = 6d
9 + 6d + 4d + -5d = 0

Combine like terms: 6d + 4d = 10d
9 + 10d + -5d = 0

Combine like terms: 10d + -5d = 5d
9 + 5d = 0

Solving
9 + 5d = 0

Solving for variable 'd'.

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

Add '-9' to each side of the equation.
9 + -9 + 5d = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 5d = 0 + -9
5d = 0 + -9

Combine like terms: 0 + -9 = -9
5d = -9

Divide each side by '5'.
d = -1.8

Simplifying
d = -1.8

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