Question

a) 15abc : abc =121

b) abc1 -2889 = 1abc

Answer 1

 

a/

15abc : abc = 121

15000 + abc = 121 x abc

15000=120 x abc => abc = 15000:120=125

b/

abc1 - 2889 = 1abc

10 x abc + 1 -2889 = 1000 + abc

9 x abc = 3888 => abc = 3888 : 9 = 432