Respuesta :

apologiabiology
x=one dollar
y=5 dollar

x=3y
1x+5y=40
3y+5y=40
8y=40
divide 8
y=5
x=3y
x=3(5)
x=15

15 one dollars
5 five dollars

number of $5 dollar notes = 5

number of $1 dollar notes  = 15

The wallet contain $40.

let

number of $5 dollar note  = x

number of $1 dollar notes = 3x

Therefore,

5x + 1(3x) = 40

5x + 3x = 40

8x = 40

x = 40 / 8

x = 5

number of $5 dollar notes = 5

number of $1 dollar notes = 3(5) = 15

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