Question

metodo sustitucion

8x+9y=8
3x+10y=5

Answer 1

10*(8x + 9y = 8)
-9*(3x + 10y =5)

80x + 90y = 80
-27x - 90y = -45

53x = 35
x = 35/53

Reemplazando:
3(35/53) + 10y = 5
105/53 + 10y = 5
105 + 530y /53 = 5
105 + 530y = 265
530y = 160
y = 16/53

Las cantidades son x = 35/53 , y=16/53