Question

12A +6AB = B49 Find the value of A and B

Answer 1

A=2 and B =7

Step-by-step explanation:

• Given

        1 2 A

     +6 A B

       B 4 9

• First consider second column

        2

     + A

        4        This is only possible when A =2

                  Because 2 + 2 =4

• Now consider first column from right side

          A                    2  

       + B                +B

          9     ⇒           9            This is only possible when B =7

                                              Because 2 + 7 =9

•  Now check the question

         1 2 2

       +6 2 7

         7 4 9       Hence this is correct