Question

Решите систему уравнений
Номер 6

Answer 1

Ответ:

(1,4 ;  0,4)

Объяснение:

$left { {{x-y = 1} atop {frac{x}{2} + frac{y}{4} =  frac{2x-y}{3}}} right.<=> left { {{x-y = 1} atop {frac{x}{2} + frac{y}{4} =  frac{2x-y}{3} | *12}} right.<=>left { {{x - y = 1 } atop {6x + 3y = 8x - 4y}} right.  <=>x = 1 +y 6(1+y) + 3y = 8(1+y) - 4y6 + 6y + 3y = 8 + 8y - 4y9y - 4y = 8 - 6 </h2><h2>5y = 2 = 2/5 = 0,4 </h2><h2>x = 1 + 0,4 = 1,4$