1/4x=1/2
x = 1/2 : 1/4
x = 1/2 * 4/1
x = 2
----------------------
1/4 *2 = 1/2
б) 2/9y=0
y = 0:2/9
y=0
--------------
2/9 *0 = 0
в) -2/7z=-2/7
z = - 2/7 : - 2/7
z = -2/7 * - 7/2
z = 1
------------------
-2/7 * 1 = - 2/7
г)2x= -1/3
x = - 1/3 : 2
x = - 1/3 * 1/2
x = -1/6
-------------------
2 * -1/6 = -1/3
д) 1/8y=4
y = 4:1/8
y = 4/1 * 8/1
y = 32
-------------------
1/8 *32 = 4
м) -6u=2/3
u = 2/3 : -6
u = -2/3 * 1/6
u = -1/9
-----------------------------
-6 * -1/9 = 2/3