Question

{x+z=3 x+y=5 y+z=6 三元一次方程组.大神行行好.

Answer 1

x+z=3===>z=3-x

x+y=5===>y=5-x

∵y+z=6

∴y+z=(3-x)+(5-x)=6

x=1

∴z=3-1=2

y=5-1=4