{15x+11y-47=0 5x-y+17=0

5x-y+17=0у=5х+1715x+11(5х+17)-47=015х+55х+187-47=070х+140=070х=-140х=-2у=5х+17у=5*(-2)+17у=-10+17у=7Ответ: х=-2; у=7

15х+11у-47=05х-у+17=05х=у-173(у-17)+11у-47=03у-51+11у-47=014у-98=014у=98у=75х=7-175х=-10х=-2