d*0.8=100

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Solution for d*0.8=100 equation: 


Simplifying
d * 0.8 = 100

Reorder the terms for easier multiplication:
0.8d = 100

Solving
0.8d = 100

Solving for variable 'd'.

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

Divide each side by '0.8'.
d = 125

Simplifying
d = 125

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