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A pack of gum costs 50 cents. That is 4 cents less than four times what the pack cost 15 years ago.

*Write an equation that could be used to find the cost of the gum 15 years ago. Then solve and find the price of gum 15 years ago

Respuesta :

y = (50+4)/4
y = 13.5
Let x be the cost of the gum 15 years ago.
This gives the equation:-

4x - 4 =  50
4x = 54
x = 13.5 cents

Answer 13.5 cents

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