Ответ:\(4x-6y+5y=4x-y\).\(7y-9y+2x+2y=2x\).\(y-2x-y+x=-x\).\(0.3y-0.1x-0.9x+0.7y=x-0.8y\).\(\frac15x-2.8y-0.2x+\frac45y=0-2y=-2y\).\(-\frac53y+1.5x+1.6y-0.5x=x-\frac1{15}y\).\(\frac13y-\frac13x+\frac13y+\frac13x+\frac13y=y\).