4х-5у=18
х=-1
у=4
4×(-1)-5×4=-4-20=-24
4×3-5×0=12-0=12
4×4-5×2=16-10=6
4×(-2)-5×2=-8-10=-18
4×2-5×(-2)=8-(-10)=18
4х-5у=18
х=-1
у=4
4×(-1)-5×4=-4-20=-24
4×3-5×0=12-0=12
4×4-5×2=16-10=6
4×(-2)-5×2=-8-10=-18
4×2-5×(-2)=8-(-10)=18