Question

y-z=35 y-x=5 x+y+z=180 次方程怎么解呀 急!

Answer 1

y-z=35 ,y=35+z -------[1]

y-x=5 -------[2]

x+y+z=180 -----[3]

[1]-[2]:x-z=30,x=30+z

代入[3]：

30+z+35+z+z=180,z=115/3

x=90/3+115/3=205/3

y=105/3+115/3=215/3