爱上海后花园

1/2x+1/3x=3/4(解方程) 17-120%x=5 x-1\4x=1/2 x÷2/3-5x乘1/4=1/4

12x13x=346x4x=910x=9x=0917120x=512x=51712x=12x=10x1\\4x=124xx=23x=2x=23x235x14=146x5x=1x=1...

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