已知x-2y=2,求3x+y-6/4x-y-8的值
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已知x-2y=2,求3x+y-6/4x-y-8的值已知x-2y=2,求3x+y-6/4x-y-8的值已知x-2y=2,求3x+y-6/4x-y-8的值x=2+2y带入式子3x+y-6=3(2+2y)+
已知x-2y=2,求3x+y-6/4x-y-8的值
已知x-2y=2,求3x+y-6/4x-y-8的值
已知x-2y=2,求3x+y-6/4x-y-8的值
x=2+2y 带入式子
3x+y-6=3(2+2y)+y-6=7y
4x-y-8=4(2+2y)-y-8=7y
3x+y-6/4x-y-8=1
3x+y-6=3(2+2y)+y-6=7y
4x-y-8=4(2+2y)-y-8=7y
3x+y-6/4x-y-8=1
x=2y-2
代入,得:=1
x=2+2y 带入式子 得3/4 就是0.75
3x+y-6=3(2+2y)+y-6=7y
4x-y-8=4(2+2y)-y-8=7y
3x+y-6/4x-y-8=1(y不等于0)
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