0.4 * (6x - 3 ) = - 3.6x;
(- 4 z) * 3 = 1.4 - 5z

0,4*(6х-3)=-3,6х2,4х-1,2=-3,6х2,4х+3,6х=1,26х=1,2х=1,2:6х=0,2(-4z)*3=1.4-5z-12z=1.4-5z-12z+5z=1.4-7z=1.4z=1.4:(-7)z=-0.2