19х-12х=3,192 6х-11,4=3,3,448 3х+5х+0,136=6,7 4,18-12х=3,22
19х - 12х=3,192 7х=3,192 х=0,456 6х - 11,4=33,448 6х=44,848 х=7,475 3х+5х+0,136=6,7 8х=6,564 х=0,8205 4,18 - 12х=3,22 -12х= -0,96 х=0,08