Question

2x + y = 5
2) x+3y=5
2x - y =3
3) 4x + 3y = 1
x + y = 1
3x - 4y = 7
5x - y = 7
2x+3y=-4

ayuda plis​

Answer 1

Respuesta:

$2x + y = 5 \\ 2x = 5 - y \\ 2x = 4 \\ x = 4 \div 2 \\ x = 2 \\ \\ 2(2) + y = 5 \\ 4 + y = 5 \\ y = 5 - 4 \\ y = 1$

$x + 3y = 5 \\ 3y = 5 - x \\ 3y = 4 \\ y = 4 \div 3 \\ y = 1.3 \\ \\ x + 3(1.3) = 5 \\ x + 3.9 = 5 \\ x = 5 - 3.9 \\ x = 1.1$

$2x - y = 3 \\ 2x = 3 + y \\ 2x = 4 \\ x = 4 \div 2 \\ x = 2 \\ \\ 2(2) - y = 3 \\ 4 - y = 3 \\ y = 3 - 4 \\ y = 1$