Question

x + y = 8 x – y = 10

Answer 1

Explicación paso a paso:

$x + y = 8 \\ \\ x + x - (8) = 0 \\ \\ 2x - 8 = 0 \\ \\ 2x = 8 \\ \\ x = 8/2 \\ \\ x = 4$

$x – y = 10 \\ \\ x - x - (10) = 0 \\ \\ 2x - 10 = 0 \\ \\ 2x = 10 \\ \\ x = 5$

Saludos

ecuacion 2