2Y/3-1=Y+2/4-1解：8Y-12=3Y+6-12 5Y=6 Y=6/5 或者是这样2Y-1/3=Y+2/4-18Y-4=3Y+6-12 5Y=-2 Y=-2/5
3分之2y-1=4分之y+2-1 8y-4=3y+6-35y=7y=5/7
y=7分之8
y等于七分之八
