Seudónimo Seudónimo
  • 03-05-2017
  • Mathematics
contestada

A pack of gum costs 75 cents. That is 3 cents less than three times what the pack cost 20 years ago. Which equation could be used to find the cost of the gum 20 years ago?

Respuesta :

tiza
tiza tiza
  • 03-05-2017
let's assume the cost 20 years ago equals x

3x - 3 = 75

or

x = 75 / 3 + 3
Answer Link
Аноним Аноним
  • 03-05-2017
75=3c-3
(c stands for cost 20 years ago)
Answer Link

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