Oblicz liczbę a , jeżeli 3/5 * a = 2/7
3/5 * a = 2/7
a = 2/7 : 3/5
a = 2/7 * 5/3
a= 10/21
a = 10/21
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3/5 * a = 2/7
a = 2/7 : 3/5
a = 2/7 * 5/3
a= 10/21
3/5 * a = 2/7
a = 2/7 : 3/5
a = 2/7 * 5/3
a = 10/21