The calculation of AB times BA is given below: the first line is 384, the second line is 2560, and their sum is the third line 2944. What are the values of A and B?
Find the values of a and b:
12 x a + b = 98
123 x a + b+1 = 987
1234 x a + b+2 = 9876
12345 x a + b+3 = 98765
123456 x a + b+4 = 987654
1234567 x a + b+5 = 9876543
12345678 x a + b+6 = 98765432
123456789 x a + b+7 = 987654321
