几个一元一次不等式求解= = ①3{x-2(x-2)}>x-3(x-3) ②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.③-y-2分之y-1≥2-5分之y+2④4分之3x+2-8分之7x-3>2.5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?
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![几个一元一次不等式求解= = ①3{x-2(x-2)}>x-3(x-3) ②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.③-y-2分之y-1≥2-5分之y+2④4分之3x+2-8分之7x-3>2.5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?](/uploads/image/z/2549702-38-2.jpg?t=%E5%87%A0%E4%B8%AA%E4%B8%80%E5%85%83%E4%B8%80%E6%AC%A1%E4%B8%8D%E7%AD%89%E5%BC%8F%E6%B1%82%E8%A7%A3%3D+%3D+%E2%91%A03%7Bx-2%28x-2%29%7D%EF%BC%9Ex-3%EF%BC%88x-3%EF%BC%89+%E2%91%A13%E5%88%86%E4%B9%8B1%EF%BC%882x-1%EF%BC%89%2Bx-1%2B3%E5%88%86%E4%B9%8B1%EF%BC%881-2x%EF%BC%89%E2%89%A40.%E2%91%A2-y-2%E5%88%86%E4%B9%8By-1%E2%89%A52-5%E5%88%86%E4%B9%8By%2B2%E2%91%A34%E5%88%86%E4%B9%8B3x%2B2-8%E5%88%86%E4%B9%8B7x-3%EF%BC%9E2.5.%E5%BD%93k%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2C%E6%96%B9%E7%A8%8B2%E5%88%86%E4%B9%8B1x-2k%3D3%EF%BC%88x-k%EF%BC%89%2B1%E7%9A%84%E8%A7%A3%E4%B8%BA%E8%B4%9F%E6%95%B0%3F)
几个一元一次不等式求解= = ①3{x-2(x-2)}>x-3(x-3) ②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.③-y-2分之y-1≥2-5分之y+2④4分之3x+2-8分之7x-3>2.5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?
几个一元一次不等式求解= = ①3{x-2(x-2)}>x-3(x-3) ②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.
③-y-2分之y-1≥2-5分之y+2
④4分之3x+2-8分之7x-3>2.
5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?
几个一元一次不等式求解= = ①3{x-2(x-2)}>x-3(x-3) ②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.③-y-2分之y-1≥2-5分之y+2④4分之3x+2-8分之7x-3>2.5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?
①3{x-2(x-2)}>x-3(x-3)
3(x-2x+4)>x-3x+9;
12-3x>9-2x;
x<3;
②3分之1(2x-1)+x-1+3分之1(1-2x)≤0.
2x-1+3x-3+1-2x≤0;
3x≤3;
x≤1;
③-y-2分之y-1≥2-5分之y+2
-10y-5y+5≥20-2y-4;
-13y≥11;
y≤-11/13;
④4分之3x+2-8分之7x-3>2.
6x+4-7x+3>16;
-x>9;
x<-9;
5.当k取何值时,方程2分之1x-2k=3(x-k)+1的解为负数?
x/2-2k=3(x-k)+1;
x/2-2k=3x-3k+1;
5x/2=k-1;
x=2(k-1)/5;
∴2(k-1)/5<0;
∴k<1;
如果本题有什么不明白可以追问,