15d+4=8d+25

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Solution for 15d+4=8d+25 equation:


Simplifying
15d + 4 = 8d + 25

Reorder the terms:
4 + 15d = 8d + 25

Reorder the terms:
4 + 15d = 25 + 8d

Solving
4 + 15d = 25 + 8d

Solving for variable 'd'.

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

Add '-8d' to each side of the equation.
4 + 15d + -8d = 25 + 8d + -8d

Combine like terms: 15d + -8d = 7d
4 + 7d = 25 + 8d + -8d

Combine like terms: 8d + -8d = 0
4 + 7d = 25 + 0
4 + 7d = 25

Add '-4' to each side of the equation.
4 + -4 + 7d = 25 + -4

Combine like terms: 4 + -4 = 0
0 + 7d = 25 + -4
7d = 25 + -4

Combine like terms: 25 + -4 = 21
7d = 21

Divide each side by '7'.
d = 3

Simplifying
d = 3

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