Question

Find the value of 'a' if x =7 and y = 5 is the solution of the equation 3x + ay = 31.
1
2
3
5
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Answer 1

3x+ay=31

3×7+5a=31

21+5a=31

a=2

Answer 2

Answer:

The value of a is 2

Step-by-step explanation:

solution;

      3x +ay = 31

  or, 3×7 + a× 5 = 31

or, 21 + 5a =31

or, 5a = 31- 21

 or, 5a = 10

 or, a= 10/ 5

  ∴ a= 2