Question

Resolva o sistema!!!:
5x+y=17
6x+y=19

Answer 1

Resposta:

S={( 2 , 7 )}

Explicação passo-a-passo:

Usando o método da adição :

5x+y=17 .(-1)

6x+y=19

_________

-5x-y=-17

6x+y=19

_________

6x-5x=19-17

x=2

y=17-5x

y=17-5.(2)

y=17-10

y=7

Answer 2

$\begin{cases}5x+y=17\\6x+y=19\end{cases}$

$+\underline{\begin{cases}-5x-y=-17\\6x+y=19\end{cases}}$

$\boxed{\boxed{\mathsf{x=2}}}$

$5x+y=17\\5.2+y=17\\y+10=17\\y=17-10$

$\boxed{\boxed{\mathsf{y=7}}}$

$\boxed{\boxed{\mathsf{s=\{2,7\}}}}$