Question

if x=7 and y=5 is the solution of 3x+ ay=31 then find the value of a
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Answer 1

Answer:

x = 7, y = 5

3x + ay = 31

=> (3 × 7) + (a × 5) = 31

=> 21 + 5a = 31

=> 5a = 31 - 21

=> 5a = 10

=> a = 10/2

=> a = 5

Ans. 5

Hope it helps.