(6х+1)(3х+2)=(9х-1)(2х+5)-3х

(6х+1)×(3х+2)=(9х-1)×(2х+5)-3х6х+1×3х+2=9х-1×2х+5-3х6х×3х-9х÷2х+3х=-1+5-2-17.5х=1х=1÷7.5х(примерно)=0.1(3)