x+y=250,x/19+y/10=16,求x和y的值本题全题为“一块金与银的合金重250g,放在水中称,减轻了16g.已知金在水中称,金重减轻1/19;银在水中称,银重减轻1/10.求这块合金中金,银各多少克.”
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![x+y=250,x/19+y/10=16,求x和y的值本题全题为“一块金与银的合金重250g,放在水中称,减轻了16g.已知金在水中称,金重减轻1/19;银在水中称,银重减轻1/10.求这块合金中金,银各多少克.”](/uploads/image/z/2469615-15-5.jpg?t=x%2By%3D250%2Cx%2F19%2By%2F10%3D16%2C%E6%B1%82x%E5%92%8Cy%E7%9A%84%E5%80%BC%E6%9C%AC%E9%A2%98%E5%85%A8%E9%A2%98%E4%B8%BA%E2%80%9C%E4%B8%80%E5%9D%97%E9%87%91%E4%B8%8E%E9%93%B6%E7%9A%84%E5%90%88%E9%87%91%E9%87%8D250g%2C%E6%94%BE%E5%9C%A8%E6%B0%B4%E4%B8%AD%E7%A7%B0%2C%E5%87%8F%E8%BD%BB%E4%BA%8616g.%E5%B7%B2%E7%9F%A5%E9%87%91%E5%9C%A8%E6%B0%B4%E4%B8%AD%E7%A7%B0%2C%E9%87%91%E9%87%8D%E5%87%8F%E8%BD%BB1%2F19%EF%BC%9B%E9%93%B6%E5%9C%A8%E6%B0%B4%E4%B8%AD%E7%A7%B0%2C%E9%93%B6%E9%87%8D%E5%87%8F%E8%BD%BB1%2F10.%E6%B1%82%E8%BF%99%E5%9D%97%E5%90%88%E9%87%91%E4%B8%AD%E9%87%91%2C%E9%93%B6%E5%90%84%E5%A4%9A%E5%B0%91%E5%85%8B.%E2%80%9D)
x+y=250,x/19+y/10=16,求x和y的值本题全题为“一块金与银的合金重250g,放在水中称,减轻了16g.已知金在水中称,金重减轻1/19;银在水中称,银重减轻1/10.求这块合金中金,银各多少克.”
x+y=250,x/19+y/10=16,求x和y的值
本题全题为“一块金与银的合金重250g,放在水中称,减轻了16g.已知金在水中称,金重减轻1/19;银在水中称,银重减轻1/10.求这块合金中金,银各多少克.”
x+y=250,x/19+y/10=16,求x和y的值本题全题为“一块金与银的合金重250g,放在水中称,减轻了16g.已知金在水中称,金重减轻1/19;银在水中称,银重减轻1/10.求这块合金中金,银各多少克.”
x = 190 y = 60
没有问题
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
y=x(x
x+y=20,x-y=10,y=
y+10x=x+y+9 10y+x=y+10x+27
y+y+x=10,x+y+x=8,y=?,x=?
(x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5
{6/x+y+10/x-y=30 6/x+y-10/x-y=-1
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