Question

3) 4x+3y=7 3x-7y=-3

Answer 1

1 ) 4x+3y=7 *(7/3)
2) 3x-7y=-3

28/3x+7y=49/3 tachamos 7y -7y =0
3x-7y=-3

37/3x=40/3 x=40/37
reemplazamos x en 1)
4(40/37)+3y=7
160/37+3y=7
3y=99/37
y=33/37