来自梁宇澜的问题
解方程组x:y=3:4y:z=4:5x+y+z=36
解方程组x:y=3:4y:z=4:5x+y+z=36
1回答
2020-05-30 15:20
解方程组x:y=3:4y:z=4:5x+y+z=36
解方程组x:y=3:4y:z=4:5x+y+z=36
把x和z化为y,
X=3y/4
Z=5y/4
X+y+z=3y/4+5y/4+y=36
Y=12
X=9
Z-15