80+20d=120+15d

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Solution for 80+20d=120+15d equation:


Simplifying
80 + 20d = 120 + 15d

Solving
80 + 20d = 120 + 15d

Solving for variable 'd'.

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

Add '-15d' to each side of the equation.
80 + 20d + -15d = 120 + 15d + -15d

Combine like terms: 20d + -15d = 5d
80 + 5d = 120 + 15d + -15d

Combine like terms: 15d + -15d = 0
80 + 5d = 120 + 0
80 + 5d = 120

Add '-80' to each side of the equation.
80 + -80 + 5d = 120 + -80

Combine like terms: 80 + -80 = 0
0 + 5d = 120 + -80
5d = 120 + -80

Combine like terms: 120 + -80 = 40
5d = 40

Divide each side by '5'.
d = 8

Simplifying
d = 8

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