Răspuns :
151555:a=7 rest 5, 151555=7*a+5 (teorema impartirii cu rest )
7a=151555-5=151550, a=151550/7=21650
151 555 : a = 7 rest 5
a = (151 555 - 5) : 7
a = 151 550 : 7
a = 21 650
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a = (151 555 - 5) : 7
a = 151 550 : 7
a = 21 650
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