0.8x-3 / 0.3= 0,6x-8.4 / -9 ( 0.8x-3) *-9=( 0,6x-8.4)*0.3 -7.2х+27=0.18х-2.52 -7.2х-0.18х=-2.52-27 -7.38х=-29.52 х=4