5(7x+2y)-11y=6(2x+y) 33+3(6x-5y)=3(x+2y)-5y

5(7x+2y)-11y=6(2x+y) 
33+3(6x-5y)=3(x+2y)-5y

35x+10y-11y=12x+6x
33+18x-15y=3x+6y-5y

35x-12x-6x=11y-10y
33+18x-3x=15y+6y-5y

17x=y
33+15x=16y

33+15x=16(17x)
33+15x=272x
33=257x

x=33/257
y=17x=17·33/257=561/257