中一方程式

5y/6 = (1/6)y - 1 《 《 《 先乘除後加減

5y/6 = y/6 - 6/6 《 《 《 同分母可省去不計

5y = y - 6

4y = - 6

y = - (6/4)

y = - 1.5

5y/6 = 1/6 y-1
5y/6=y-1/6
5y=6y-6/6
30y=6y-6
24y=-6
y=-4

5y/6 = 1/6 y-1
5y/6=y-1/6
5y=6y-6/6
30y=6y-6
24y=-6
y=-4

yX5/6=1/6(y-1)
yX5/6X6/5=1/6X6/5(y-1)
y=1/5(y-1)
5y=y-1
5y-1y=y-1-1y
4y=1
y=1/4=0.25

2008-01-16 16:06:37 補充：
OR5y/6=1/6y -15y= (1/6y -1) X65y= y-64y=-6y=-6/4 =-1.5

5y/6 = 1/6 y -1

(5y/6) X 6 = (1/6 y -1) X6

5y = y - 6

4y = -6

y = - 1.5

2008-01-16 15:53:41 補充：
還 是5y/6 = 1/6 (y-1)5y/6 X 6 = 1/6(y-1) X 65y = y-14y = -1y = -1/4

5y/6 = (1/6)(y-1)
5y = y-1
5y - y = -1
4y = -1
y = -1/4 = -0.25