Question

ayuda, porfas paso a paso , con método de igualacion ​

Answer 1

Respuesta:

a) x = -133/9, y = 230/9

b) x = 3, y = -7

c) x = 0,6, y = -4,4

d) x = -5, y = -2

Explicación paso a paso:

Método de igualación:

a) 7x + 8y = 101 x = 101 - 8y/7

2x + y = -4 x = -4 - y/2

101 - 8y/7 = -4 - y/2 => 202 - 16y = -28 - 7y

y = 230/9 x = - 133/9

b) 6x - 6y = 60 x = 60 + 6y/6

7x + 3y = 0 x = -3y/7

60 + 6y/6 = -3y/7 => 420 + 42y = -3y/7

y = -7 x = 3

c) -3x - 2y = 7 x = 7 + 2y/-3

-4x - 6y = 24 x = 24 + 6y/-4

7 + 2y/-3 = 24 + 6y/-4 => -28 - 8y = -72 - 18y

y = -4,4 x = 0,6

d) -6x - 2y = 34 x = 34 + 2y/-6

7x - 4y = -27 x = -27 + 4y/7

34 + 2y/-6 = -27 + 4y/7 => 238 + 14y = 162 - 24y

y = -2 x = -5

RPTA: a) x = -133/9, y = 230/9

b) x = 3, y = -7

c) x = 0,6, y = -4,4

d) x = -5, y = -2