Question

Resolva o sistema de equação:

x + 2 y = 5
2 x - 3 y = 3 ​

Answer 1

x+2y=5 ×(-2)

2x-3y=3

-2x-4y=-10

+2x-3y=3

-7y=-7×(-1)

$7y = 7 \\ y = \frac{7}{7} \\ y = 1$

x+2y=5

x+2.1=5

x+2=5

x=5-2

x=3

s={3,1}