chrisndad123 chrisndad123
  • 09-05-2020
  • Mathematics
contestada

A store marks up some shoes 60% to $128. What did they cost before the mark up?

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Chelboy
Chelboy Chelboy
  • 10-05-2020

Answer:$320

Step-by-step explanation:

60=(a-128)/a x 100

60=100(a-128)/a

Cross multiplying we get

60a=100(a-128)

60a=100a-12800

Collect like terms

12800=100a-60a

12800=40a

Divide both sides by 40

12800/40=40a/40

320=a

a=320

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