{15x+11y-47=0 {5x-y+17=0 {8x-9y-21=0 {3x-2y-12=0

Question

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

{8x-9y-21=0
{3x-2y-12=0

Answer 1

15х+11у-47=0 5х-у+17=0 /*(-3) 15х+11у-47=0 -15х+3у-51=0 14у-98=0 14у=98 у=7 5х-7+17=0 5х+10=0 5х=-10 х=-2