Question

If 2x - 3y = -1 and 5x - 4y = 15 and both satisfied by x = 'a' and y = 'b', then the value of 'a' is
1. 10
2. 4
3. 7
4. 1

Answer 1

Correct Answer - Option 3 : 7

Given:

2x - 3y = -1 and 5x - 4y = 15

Calculation:

⇒ 2x - 3y = - 1 .... (1)

⇒ 5x - 4y = 15 .... (2)

⇒ x = 7, y = 5, Or a = 7, b = 5

∴ The required result will be 7.