8х+2у=11,4х+5у=11 решите системой ...плиз

8x=11-2yx=(11-2y)/84(11-2y)/8+5y=11(11-2y)/2+5y=1111-2y+10y=228y=11y=11/8x=(11-2(11/8))/8x= 11/8-(22/16)/8x= 11/8-22/128x= (11*16-22)/128x= 154/128