450=0.80(d-100)

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Solution for 450=0.80(d-100) equation: 


Simplifying
450 = 0.80(d + -100)

Reorder the terms:
450 = 0.80(-100 + d)
450 = (-100 * 0.80 + d * 0.80)
450 = (-80 + 0.80d)

Solving
450 = -80 + 0.80d

Solving for variable 'd'.

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

Add '-0.80d' to each side of the equation.
450 + -0.80d = -80 + 0.80d + -0.80d

Combine like terms: 0.80d + -0.80d = 0.00
450 + -0.80d = -80 + 0.00
450 + -0.80d = -80

Add '-450' to each side of the equation.
450 + -450 + -0.80d = -80 + -450

Combine like terms: 450 + -450 = 0
0 + -0.80d = -80 + -450
-0.80d = -80 + -450

Combine like terms: -80 + -450 = -530
-0.80d = -530

Divide each side by '-0.80'.
d = 662.5

Simplifying
d = 662.5

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