2х+3=х-6; z+4-3=2z; 5-3у=4-2у; 7-3х=4х-9; 6а-1=3а+7; 10у-3=5+3у

2х+3=х-62х-х=-6-3х=-9z+4-3=2z4-3=2z-z1=z5-3y=4-2y-3y+2y=4-5-y=-1y=17-3x=4x-9-3x-4x=-9-7-7x=-16x=-16/-7x=2,296a-1=3a+76a-3a=7-63a=1a=1/3=0.3310y-3=5+3y10y-3y=5+37y=8y=8/7=1.14