Question

x+3y=5
2x-y=4
Avaliaçao de matematica . Respontas

Answer 1

X+3y=5(-2)
2x-y=4(1)

Logo:

-2x-6y= -10
2x-y=4

5y= -10
y= -2

Substituindo y:

x+3y=5   
x+3(-2) = 5
x -6=5
x=11