.80(d-100)=450

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Solution for .80(d-100)=450 equation: 


Simplifying
0.80(d + -100) = 450

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

Solving
-80 + 0.80d = 450

Solving for variable 'd'.

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

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

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

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

Divide each side by '0.80'.
d = 662.5

Simplifying
d = 662.5

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