Question

please tell me fast its urgent​

Answer 1

$\huge\red{Answer:-}$

GIVEN INFORMATION,

$2x - y = 7 \: and \\ 4x + 3y = 9$

We have to find value of x + 3y

$2x - y = 7 \\ = > y = 2x - 7 \: (equation \: 1)$

$4x + 3y = 9 \: (equation \: 2) \\ \\ = > 4x + 2x - 7 = 9 \: (putting \: value \: of \: equation \: 1 \: in \: equation \: 2)\\ = > 6x - 7 = 9 \\ = > 6x = 16 \\ = > x = \frac{8}{3}$

Therefore, y = 2 × 8/3 - 7

= -5/3

Now,

$x + 3y = \frac{8}{3} + ( \frac{3}{1} \times \frac{ - 5}{3}) \\ = \frac{ - 7}{3}$

$x + 3y = \frac{ - 7}{3}$