Odpowiedź:
a)
7/3a= 7/10 /: 7/3
a= 7/10 * 3/7
a= 3/10
b)
-b = 1 5/6 - 2 1/2
-b= 1 5/6 - 2 3/6
-b= -1 1/3 / * (-1)
b= 1 1/3
C)
1/4 c= 2.2+0.8
1/4 c = 3 /: ( 1/4)
C= 12
d)
3d/4 = 7/4 /*4
3d= 7 /:3
d= 7/3
d= 2 1/3
