解方程组{2x+y+z=2{x+2y+z=4{x+y+2z=6
2个回答
{2x+y+z=2
{x+2y+z=4
{x+y+2z=6
相加后除以4
x+y+z=2.5
x=-0.5
y=1.5
z=2.5
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