Сергейsh99 19х-12х=3,192
7х=3,192
х=0,456

irка010708 1 9х - 12х=3,192
7х=3,192
х=3,192:7 х=0,456 -корень уравнения
(19×0,456) -(12×0,456 ) =3,192
8,6640 - 5,4720=3,192
3,192 =3,192