Question

(ii) 2x + 3y = 9
3x + 4y = 5
by substitutional method​

Answer 1

Answer:

2x+3x+3y+4y=5+9

5x + 7y=14

Answer 2

$2x + 3y = 9 \\ 2x = 9 - 3y \\ x = \frac{9 - 3y}{2}$

$3x + 4y = 5 \\ 3( \frac{9 - 3y}{2} ) + 3y = 5 \\ 3(9 - 3y) + 3y \times 2 = 5 \times 2 \\ 27 - 9y + 6y = 10 \\ y = \\ y = 10$

$x = \frac{9 - 3y}{2} \\ x = \frac{9 - 3 \times 10}{2} \\ x = \frac{9 - 30}{2} \\ x = \frac{ - 21}{2}$