найдите х в пропорции 3х+1,2/2,8=5,1/3,4 2)6,3/3,5=2х+1,9/5,5

N 1 2,8•5,1 = 3,4( 3x + 1,2 ) 14,28 = 10,2x + 4,0810,2x = 10,2X = 1 N 2 6,3•5,5 = ( 2x + 1,9 )•3,534,65 = 7x + 6,657x = 28X = 4