Question

ecuacion lineal 2x2
2x+y=4
x+2y=5

Answer 1

Respuesta:

x = 1 ; y = 2

Explicación paso a paso:

2x + y = 4

x + 2y = 5

x = 5 - 2y

2(5 - 2y) + y = 4

10 - 4y + y = 4

10 - 3y = 4

-3y = 4 - 10

y = -6/-3

y = 2

x + 2y = 5

x + 2(2) = 5

x + 4 = 5

x = 5 - 4

x = 1

PRUEBA:

2(1) + (2) = 4

2 + 2 = 4

4 = 4 ✓

x + 2y = 5

(1) + 2(2) = 5

1 + 4 = 5

5 = 5