CMAT 2018 Slot 1 Question 5

Question 5

If AB + C = D, find A and C given that when B = 6, D = 30 and when B = 8, D = 36.

Solution

Given AB + C = D................................(1

If B = 6 and D = 30,  then from (1),

6A + C = 30........................(2)

and If B = 8 and D = 36,

8A + C = 36........................(3)

(3)-(2) => 2A = 6

=> A= 3

Substituting the value of A in equation (2) we get,

18 + C = 30

=> C = 12.


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