Question

8x - 5y = 49 7x + 15y = 101

Answer 1

8x - 5y = 49
7x + 15y = 101


-7(8x - 5y = 49 )............-56x+35y=-343
8(7x + 15y = 101)...........56x+120y=808 
                                            155y=465.............y=465/155....y=3
si y=3..........8x-5y=49....8x-5(3)=49.....8x-15=49....8x=49+15....8x=64
x=64/8......x=8
respuesta x=8    y=3