(3x+4)(4x-3)-3x=(2x+5)(6x-7)
(3х+4)(4х-3)-3х=(2х+5)(6х-7)
3х+4+4х-3-3х=2х+5+6х-7
3х+4х-3х+4-3=2х+6х+5-7
4х+1=8х-2
4х-8х=-2-1
-4х=-3
х=3/4
х=0,75