.80(d-100)=50

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


Simplifying
0.80(d + -100) = 50

Reorder the terms:
0.80(-100 + d) = 50
(-100 * 0.80 + d * 0.80) = 50
(-80 + 0.80d) = 50

Solving
-80 + 0.80d = 50

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 = 50 + 80

Combine like terms: -80 + 80 = 0
0 + 0.80d = 50 + 80
0.80d = 50 + 80

Combine like terms: 50 + 80 = 130
0.80d = 130

Divide each side by '0.80'.
d = 162.5

Simplifying
d = 162.5

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