Question

8x+6y=340
60x+35y=2250

Answer 1

(8x+6y = 340) por 7.5 = 60x+45y = 2550

60x+45y = 2550 (-)   resta de ecuaciones

60x+35y = 2250

_____________

        10y = 300

           y = 300/10

           y = 30

8x+6(30) = 340

8x+180 = 340

8x = 340-180

x = 160/8

x = 20