3分之1(x-1)+3分之4(x+1)<4分之1x-1)+3分之2(x+1)

问题描述:

3分之1(x-1)+3分之4(x+1)<4分之1x-1)+3分之2(x+1)

(x-1)/3+4(x+1)/3<(x-1)/4+2(x+1)/3
4(x-1)+16(x+1)/3<3(x-1)+8(x+1)
4x-4+16x+16