3/2(y+1)-3/2(2y-1)=1/5(3y-2)-1/10
乘以10得 15(y+1)-15(2y-1)=2(3y-2)-1
15y+15-30y+15=6y-4-1
15y-30y-6y=-4-1-15-15
-21y=-35
y=5/3
3/2(y+1)-3/2(2y-1)=1/5(3y-2)-1/10
1.5y+1.5-3y+1.5=0.6y-0.4-0.1
(1.5-3-0.6)y=-0.4-0.1-1.5=-2
-1.1y=-2
1.1y=2
y=20/11
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