Question

e) 2x + 3y = 13 f) x + 2y = 7

Answer 1

Respuesta:

$2x + 3y = 13 \\ x + 2y = 7$

$x =7 - 2y$

$2(7 - 2y) + 3y = 13 \\ 14 - 4y + 3y = 13 \\ - y = 13 - 14 \\ - y = - 1 \\ y = - 1 \div - 1 \\ y = 1$

$x = 7 - 2y \\ x = 7 - 2(1) \\ x = 7 - 2 \\ x = 5$