Question

1: 5x + 6y = 20 2: 3x + 8y = 34

Answer 1

5x + 6y = 20...I

3x + 8y = 34 ....II

para encontrar y

(5x + 6y = 20) x3 ---> 15 x + 18y = 60
(3x + 8y = 34) x5 ---> 15 x + 40y = 170
se cancelan los x=
22y= 110
y= 5

reemplazamos y en ...I
5x + 6(5) = 20

5x = -10
x= -2