300-50=.80(d-100)

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Solution for 300-50=.80(d-100) equation: 


Simplifying
300 + -50 = 0.80(d + -100)

Combine like terms: 300 + -50 = 250
250 = 0.80(d + -100)

Reorder the terms:
250 = 0.80(-100 + d)
250 = (-100 * 0.80 + d * 0.80)
250 = (-80 + 0.80d)

Solving
250 = -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.
250 + -0.80d = -80 + 0.80d + -0.80d

Combine like terms: 0.80d + -0.80d = 0.00
250 + -0.80d = -80 + 0.00
250 + -0.80d = -80

Add '-250' to each side of the equation.
250 + -250 + -0.80d = -80 + -250

Combine like terms: 250 + -250 = 0
0 + -0.80d = -80 + -250
-0.80d = -80 + -250

Combine like terms: -80 + -250 = -330
-0.80d = -330

Divide each side by '-0.80'.
d = 412.5

Simplifying
d = 412.5

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