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 [tex]y=3x-10[/tex] .... (1)
Kevin earned $71, so y= 71 ... (2)
Equaling (1) and (2)
[tex]3x-10=71[/tex]
[tex]3x=81[/tex]
[tex]x=27[/tex]
Hence, Yun earned $27
