Question

Alguem sabe resolver ?


x+y+z=6 2x+y+3z=14 x+2y+z=7

Answer 1

Resposta:

x = 2; y = 1; z = 3

Explicação passo-a-passo:

x + y + z = 6

2x + y + 3z = 14

x + 2y + z = 7

y = 6 - x - z

2x + 6 - x - z + 3z = 14

x + 2z = 8

x = 8 - 2z

8 - 2z + 2 × (6 - 8 + 2z - z) + z = 7

8 - z + 2 × (-2 + z) = 7

8 - z - 4 + 2z = 7

z = 7 - 8 + 4

z = 3

x = 8 - 2 × 3

x = 8 - 6

x = 2

y = 6 - 2 - 3

y = 1