4x+3y=6,2x+y-4=0

问题描述:

4x+3y=6,2x+y-4=0

4x+3y=6.(1)
2x+y-4=0.(2)
由(2)得
y=4-2x
代入(1)得
4x+12-6x=6
2x=6
x=3

y=4-2x=4-6=-2
解得
x=3
y=-2