1)设甲=4x, 乙=3x
=> (4x-12)/2=(3x+12)/3
=>12x-36=6x+24
=>6x=60
=>x=10
甲=40, 乙=30
2)设女=x, 男=y,
=>7x/5=8y/5
=>x/y=8/7
y(%)=7/15*100%=46.67%
x(%)=100%-46.67%=53.33%
3)1人1个饭碗,2人1个菜碗,3人一个汤碗
取最小公倍数=6人6个饭碗,3个菜碗,2个汤碗=6人11个碗
110个碗/11=10 (60人!)
1)设甲=4x, 乙=3x
=> (4x-12)/2=(3x+12)/3
=>12x-36=6x+24
=>6x=60
=>x=10
甲=40, 乙=30
2)设女=x, 男=y,
=>7x/5=8y/5
=>x/y=8/7
y(%)=7/15*100%=46.67%
x(%)=100%-46.67%=53.33%
3)1人1个饭碗,2人1个菜碗,3人一个汤碗
取最小公倍数=6人6个饭碗,3个菜碗,2个汤碗=6人11个碗
110个碗/11=10 (60人!)