Question

5x + y = 5
10x - 2y = -2

Answer 1

Resposta:

5x + y = 5

10x - 2y = -2

5x + y = 5 → y = 5 - 5x

10x - 2y = -2

10x - 2 ( 5 - 5x ) = -2

10x - 10 + 10x = -2

20x = 10 -2

x= 8/20

x = 2/5

y = 5 - 5x

y = 5 - 5 (2/5)

y = 5 - 10/5

y = 5 - 2

y = 3

S = {2/5; 3}