Question

Método de sustitución
8x-3=7
8y-3x=18

Answer 1

Método: Sustitución

{8x - 3 = 7

{8y - 3x = 18

8x - 3 = 7

8x = 7 + 3

8x = 10

x = 5/4

{x = 5/4

{8y - 3x = 18

8y - 3 × 5/4 = 18

8y - 15/4 = 18

8y = 18 + 15/4

8y = 87/4

y = 87/32

(x, y) = (5/4, 87/32)