Question

as
Resalue
sisteme.
Seguntes
X+y=5
x-y=1​

Answer 1

Resposta:

$\left \{ {{x + y =5} \atop {x - y = 1}} \right.$

x = 5 - y

5 - y - y = 1

5 - 2y = 1

-2y = 1 - 5

-2y = -4 .(-1)

2y = 4

y = $\frac{4}{2}$

y = 2

x = 5 - y

x = 5 - 2

x = 3