(/为分数线)1.4x=20/3x+162.1/2(x-4)-(3x+4)= -15/2
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![(/为分数线)1.4x=20/3x+162.1/2(x-4)-(3x+4)= -15/2](/uploads/image/z/326658-66-8.jpg?t=%28%2F%E4%B8%BA%E5%88%86%E6%95%B0%E7%BA%BF%291.4x%3D20%2F3x%2B162.1%2F2%EF%BC%88x-4%EF%BC%89-%EF%BC%883x%2B4%EF%BC%89%3D+-15%2F2)
(/为分数线)1.4x=20/3x+162.1/2(x-4)-(3x+4)= -15/2
(/为分数线)
1.4x=20/3x+16
2.1/2(x-4)-(3x+4)= -15/2
(/为分数线)1.4x=20/3x+162.1/2(x-4)-(3x+4)= -15/2
1.4x=20/3x+16
12x=20x+48
8x=-48
x=-6
2.1/2(x-4)-(3x+4)= -15/2
x-4-6x-8=-15
-2x=-3
x=3/2