Question

Last week Kevin and Yun mowed lawns. Kevin earned $10 less than 3 times as much as Yun earned. If Kevin earned $71, how much did Yun earn?

Answer 1

Let the earnings of Yun be represented by = x

Let Kevin's earnings be represented by = y

As given, Kevin earned 10 less than 3 times as much as Yun earned.

Equation becomes
`y=3x-10` .... (1)

Kevin earned $71, so y= 71 ... (2)

Equaling (1) and (2)

`3x-10=71`

`3x=81`

`x=27`

Hence, Yun earned $27