Question

Sistema de ecuaciones
2x-y=12
X+2y=16

Answer 1

$2x - y = 12 ......(1)\\ 2x = 12 + y \\ x = \frac{12 + y}{2} \\ x = \frac{12 + 4}{2} \\ x = \frac{16}{2} \\ x = 8\\ \\ x + 2y = 16......(2) \\ x = 16 - 2y \\ \frac{12 + y}{2} = 16 - 2y \\ 12 + y = 2(16 - 2y) \\ 12 + y = 32 - 4y \\ y + 4y = 32 - 12 \\ 5y = 20 \\ y = \frac{20}{5} \\ y = 4$