Question

Solve the following pair of linear equations :
3x - 5y = 4
2y + 7 = 9x​

Answer 1

Step-by-step explanation:

hope it helps you see the attachment for further information

Answer 2

Answer:

$\large\boxed{\sf{x =\dfrac{9}{13}\:\: ,\:\:y = -\dfrac{5}{13}}}$

Step-by-step explanation:

Given pair of linear equations:

$3x - 5y = 4 \: \: \: \: \: \: ...........(i) \\ \\ 9x - 2y = 7 \: \: \: \: \: \: ...........(ii)$

Multiplying eqn (i) with 9 and (ii) with 3 and subtracting , we get

$= > 27x - 45y - 27x + 6y = 36 - 21 \\ \\ = > - 39y = 15 \\ \\ = > y = - \frac{15}{39} \\ \\ = y = - \frac{5}{13}$

Therefore, we get

$= > 3x - 5( - \frac{5}{13} ) = 4 \\ \\ = > 3x + \frac{25}{13} = 4 \\ \\ = > 3x = 4 - \frac{25}{13} \\ \\ = > 3x = \frac{52 - 25}{13 } \\ \\ = > 3x = \frac{27}{13} \\ \\ = > x = \frac{9}{13}$

Hence, x = 9/13 and y = -5/13