l) 2,15x+6,14=7,43 => 2,15x=7,43-6,14 => 2,15x=1,29=> x=1,29/2,15 =>x=0,6
m) 1,35x-2,42/4=6,28=> 1,35x-0,605=6,28 =>1,35x=6,28+0,605 =>1,35x=6,885 => x=6,885/1,35 => x=5,1
n) 2,7·5,3-1,3x=11,97 => 14,31-1,3x=11,97 => -1,3x=11,97-14,31 => -1,3x=-2,34 => x=-2,34/-1,3 => x=1,8
