Question

x= 5-3y
2x-y= -4
RESPOSTA RAPIDA POR FAVOR

Answer 1

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$\begin{cases}\sf{x=5-3y}\\\sf{2x-y=-4}\end{cases}\\\sf{2\cdot(5-3y)-y=-4}\\\sf{10-6y-y=-4}\\\sf{-7y=-10-4}\\\sf{-7y=-14\cdot(-1)}\\\sf{7y=14}\\\sf{y=\dfrac{14}{7}}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{y=2}}}}}\\\sf{x=5-3\cdot2}\\\sf{x=5-6}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{x=-1}}}}}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{s=\{-1,2\}}}}}}$

Answer 2

Oie, Td Bom?!

{x = 5 - 3y

{2x - y = - 4

• 2x - y = - 4

2(5 - 3y) - y = - 4

10 - 6y - y = - 4

10 - 7y = - 4

- 7y = - 4 - 10

- 7y = - 14

y = -14/-7

y = 14/7

y = 2

• x = 5 - 3y

x = 5 - 3 . 2

x = 5 - 6

x = - 1

S = {(x , y) = (- 1 , 2)}

Att. Makaveli1996