1) 3а -7а = -4а
2) -8х - 5х = -13х
3) 3х - 2у +4у - 7х = -4х + 2у
3а-7а= = (3-7)а=-4а2)-8х-5х= (-8-5)х= -13х3)3х-2y+4y-7х = (3-7)х+(-2+4)у= -4х+2у
1) 3а -7а = -4а
2) -8х - 5х = -13х
3) 3х - 2у +4у - 7х = -4х + 2у
3а-7а= = (3-7)а=-4а
2)-8х-5х= (-8-5)х= -13х
3)3х-2y+4y-7х = (3-7)х+(-2+4)у= -4х+2у