3【x-2(x-2分之1)】=4x
x-2(x-2分之1)=4/3x
x-2x+1=4/3x
4/3x+x=1
7/3x=1
x=3/7
6分之1(20x+50)+3分之2(5+2x)=0 两边乘12
2(20x+50)+8(5+2x)=0
40x+100+40+16x=0
56x=-140
x=-2.5
3【x-2(x-2分之1)】=4x
x-2(x-2分之1)=4/3x
x-2x+1=4/3x
4/3x+x=1
7/3x=1
x=3/7
6分之1(20x+50)+3分之2(5+2x)=0 两边乘12
2(20x+50)+8(5+2x)=0
40x+100+40+16x=0
56x=-140
x=-2.5