1.
а) = (4х+2-х+17)/(2х-3) = (3х+19)/(2х-3)
б) = (1-2х+3-х)/(4х-3) = (4-3х)/(4-3х)
2.
а) = (2х+13+2+х)/(х+5) = (3х+15)/(х+5) = 3(х+5)/(х+5) = 3
б) = (4х-1-13+2х)/(3х-7) = (6х-14)/(3х-7) = 2(3х-7)/(3х-7) = 2
в) = (х-11-13-х)/(х-4) = -24/(х-4) = 24/(4-х)
г) = (5х-6)/х(х-3у) - (5у-2)/у(х-3у) = (у(5х-6) - х(5у-2))/ху(х-3у) = (5ху-5у-5ху+2х)/ху(х-3у) = (2х-5у)/ху(х-3у)