Odpowiedź :
Odpowiedź:
a x 2/5 = 2/9 /*5/2
a = 2/9 * 5/2 = 5/9
2/7 x a = 3/28 /*7/2
a = 3/28 * 7/2 = 3/8
1 1/4 x a = 1/3
5/4 * a = 1/3 /*4/5
a = 1/3 * 4/5 = 4/15
6/7 x a = 1 3/7 /*7/6
a = 10/7 * 7/6 = 5/3 = 1 2/3
Szczegółowe wyjaśnienie:
Odpowiedź:
a * 2/5 = 2/9
a = 2/9 : 2/5 = 2/9 * 5/2
a = 5/9
sprawdzenie 5/9 * 2/5 = 2/9
2/7 * a = 3/28
a = 3/28 : 2/7 = 3/28 * 7/2
a = 3/8
spr 2/7 * 3/8 = 3/28
1 i 1/4 * a = 1/3
a = 1/3 : 5/4 = 1/3 * 4/5
a = 4/15
spr 1 i 1/4 * 4/15 = 5/4 * 4/15 = 1/3
6/7 * a = 1 i 3/7
a = 1 i 3/7 : 6/7 = 10/7 * 7/6
a = 10/6
spr 6/7 * 10/6 = 10/7 = 1 i 3/7