Răspuns :
907 : (a+1) = 10 r 7
=> 907 = 10(a+1) + 7
900 = 10(a+1)
90 = a + 1
a = 89
=> 907 = 10(a+1) + 7
900 = 10(a+1)
90 = a + 1
a = 89
907:(a+1) = 10 r 7
907=10(a+1) + 7
900-7=10(a+1)
900=10(a+1)
a+1=900/10
a+1=90
a=90-1
a = 89
907=10(a+1) + 7
900-7=10(a+1)
900=10(a+1)
a+1=900/10
a+1=90
a=90-1
a = 89