Question

甲乙丙工人在同一时间内做876个零件,做一件零件甲用3分钟,乙用3.丙用4分钟；三人各做了多少个?

Answer 1

设甲做了X个,乙做了Y个,丙做了Z个

X+Y+Z=876

3X=3.5Y=4Z

X=3.5Y/3 Z=3.5Y/4

X+Y+Z=876

3.5Y/3+Y+3.5Y/4=876

36.5Y=10512

Y=288个

X=3.5Y/3 Z=3.5Y/4

=3.5*288/3 =3.5*288/4

=336个 =252个

答:甲做了336个,乙做了288个,丙做了252个.