Question

яка пара чисел э розв'язком системи {x+2y=4, {3x-4y=2​

Answer 1

$x + 2y = 4 \\ 3x - 4y = 2 \\ \\ x = 4 - 2y \\ 3(4 - 2y) - 4y = 2 \\ \\ x = 4 - 2y \\ 12 - 6y - 4y = 2 \\ \\ x = 4 - 2y \\ - 10y = - 10 \\ \\ x = 4 - 2y \\ y = 1 \\ \\ y = 1 \\ x = 4 - 2 \\ \\ y = 1 \\ x = 2$