1 Answer
Solution :-
Firstly let us solve for unit’s place,
B + 1 = 8
B = 7
Now let us solve for ten’s place,
A + B = 1
A + 7 = 1
A = -6 which is not possible.
Hence, A + B > 9
We know that now there should be one carry in hundred’s place and so we need to subtract 10 from ten’s place,
i.e., A + B – 10 = 1
A + 7 = 11
A = 11-7 = 4
Now to check whether our values of A and B are correct, we should solve for hundred’s place.
2 + A + 1 = B
2 + 4 + 1 = 7
7 = 7
i.e., RHS = LHS
A = 4 and B = 7
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