Question

resolva o sitema a seguir usando o metodo mais apropriado

1\2 x - y = -24

2x - y\3 = 14

URGENTEEE

Answer 1

Resposta:

y = 30

Explicação passo-a-passo:

$\left \{ {{  \frac{1}{2} x - y = -24   } \atop {  2x - \frac{y}{3} = 14   }} \right. \\\\\left \{ {{  (\frac{1}{2} x - y) (4)= -24(4)   } \atop {  (2x - \frac{y}{3})(-1) = 14(-1)   }} \right. \\\\\left \{ {{  2x - 4y = -96   } \atop {  -2x + \frac{y}{3} = -14   }} \right. \\\\\\-4y+\frac{y}{3}=-110\\\\\frac{-4y\cdot3}{3}+\frac{y}{3}=-110\\\\\frac{-12y+y}{3}=-110\\\\-11y=-110\cdot3\\-11y=-330\\11y=330\\\\y=\frac{330}{11}\\\\\fbox{y = 30}$