Question

Qual o valo de x e y Quato e essa cota

5x-8y=4

-5x+10y=0

Answer 1

5x - 8y = 4
-5x + 10y = 0

-8y = 4 - 5x

y = (4 - 5x)/(-8)


-5x + 10(4 - 5x)/(-8) = 0

-5x + (40 - 50x)/(-8) = 0

40x + 40 - 50x = 0

-10x = -40

x = 4

y = (4-5 . 4) / (-8)

y = (4 - 20) / (-8)

y = -16/(-8)


y = 2