x+y+z+a=50
x+4=y-4=4z=a/4
x=y-8 z=y/4-1 a=4y-16
y-8+y+y/4-1+4y-16=50
4y-32+4y+y-4+16y-64=200
25y=300
y=12 x=4 z=2 a=32 即答案为4 12 2 32
x+y+z+a=50
x+4=y-4=4z=a/4
x=y-8 z=y/4-1 a=4y-16
y-8+y+y/4-1+4y-16=50
4y-32+4y+y-4+16y-64=200
25y=300
y=12 x=4 z=2 a=32 即答案为4 12 2 32