4人相等时,各为x个
则原来甲x-10个,乙x+10个,丙x/2个,丁2x个
x-10+x+10+x/2+2x=270
4.5x=270
x=60
x-10=60-10=50
x+10=60+10=70
x/2=60/2=30
2x=2*60=120
答:原来甲做50个,乙做70个,丙做30个,丁做120个
4人相等时,各为x个
则原来甲x-10个,乙x+10个,丙x/2个,丁2x个
x-10+x+10+x/2+2x=270
4.5x=270
x=60
x-10=60-10=50
x+10=60+10=70
x/2=60/2=30
2x=2*60=120
答:原来甲做50个,乙做70个,丙做30个,丁做120个