x:y=2:3 y:z=4:5 4x-2y+3z=53
问题描述:
x:y=2:3 y:z=4:5 4x-2y+3z=53
答
x:y=2:3 ,2y=3x
y:z=4:5,4z=5y,12z=15y,
4x-2y+3z=53,16x-8y+12z=212,16x+7y=212,32x+14y=424,32x+21x=424,53x=424.x=8,y=12,z=15