Question

a) X+5y= -7 2x-y=8 e b) 2x+y=7 3x-y=3

Answer 1

$x + 5y = - 7 \\ 2x - y = 8 ( \times 5) \\ \\ \\ x + 5y = -7 \\ 10x - 5y = 40 \\ \\ 11x = 33 \\ x =3 \\ \\ \\ x + 5y = - 7 \\ 3 + 5y = - 7 \\ 5y = - 4 \\ y = \frac{ - 4}{3}$

$2x + y = 7 \\ 3x - y = 3 \\ \\ 5x = 10 \\ x = 2 \\ \\ 2x + y = 7 \\ 2 \times 2 + y = 7 \\ 4 + y = 7 \\ y = 3$