3/8x+3/5y=60 ①
5/8x+2/5y=64②
①﹢②
x﹢y=124
x=124﹣y③
②﹣①
1/4x﹣1/5y=4
5x﹣4y=80④
将③代入④
5×﹙124﹣y﹚﹣4y=80
620﹣5y﹣4y=80
620﹣9y=80
9y=620﹣80
9y=540
y=60
将y=60代入③
x=124﹣60
x=64
∴x=64 、y=60
3/8x+3/5y=60 ①
5/8x+2/5y=64②
①﹢②
x﹢y=124
x=124﹣y③
②﹣①
1/4x﹣1/5y=4
5x﹣4y=80④
将③代入④
5×﹙124﹣y﹚﹣4y=80
620﹣5y﹣4y=80
620﹣9y=80
9y=620﹣80
9y=540
y=60
将y=60代入③
x=124﹣60
x=64
∴x=64 、y=60