Question

(3x+5)(4x-1)=(6x-3)(2x+7)

Answer 1

(3x+5)(4x-1)=(6x-3)(2x+7)
3х+5*4х=6х-3*2х+7
3х+4х-6х-2х=-3+7-5
-х=-1 

Answer 2

12х^2-3х+20х-5=12х^2-6х+42х-21
-19х=-16
19х=16
х=16/19