5х(3х-2)+2(х-3)-3х(4х+4)=3х²+14
15х²-10х+2х-6-12х²-12х=3х²+14
15х²-3х²-12х²-10х-12х+2х-6-14=0
-20х-20=0
20х=-20
х=-1
5х(3х-2)+2(х-3)-3х(4х+4)=3х²+14
15х²-10х+2х-6-12х²-12х=3х²+14
15х²-3х²-12х²-10х-12х+2х-6-14=0
-20х-20=0
20х=-20
х=-1