解方程组 3x+4y=5,2x-4y=1
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解方程组 3x+4y=5,2x-4y=1
![解方程组 3x+4y=5,2x-4y=1](/uploads/image/z/4302467-35-7.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+3x%2B4y%3D5%2C2x-4y%3D1)
3x+4y+2x-4y=6
x=6/5
4y=12/5-1=7/5
y=7/20
x=6/5
4y=12/5-1=7/5
y=7/20
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
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