解方程组5x+8y=120 400x+500y=8200
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解方程组
5x+8y=120
400x+500y=8200
5x+8y=120
400x+500y=8200
![解方程组5x+8y=120 400x+500y=8200](/uploads/image/z/16170947-35-7.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%845x%2B8y%3D120+400x%2B500y%3D8200)
5X+8Y=120 X=(120-8Y)/5
4X+5Y=82 (120-8y)*4/5+5y=82
96-7y/5=82
7y/5=14
y=10
x=8
4X+5Y=82 (120-8y)*4/5+5y=82
96-7y/5=82
7y/5=14
y=10
x=8
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