[tex]x=-0,2\\\\1,5(x-2)-2(3-1,5x)=(1,5x-3)\underline {\underline {+}}(1,5x-3)=\\\\=(1,5x-3)\cdot (1+2)=3\cdot (1,5x-3)=3\cdot \Big (1,5\cdot (-0,2)-3\Big )=\\\\=3\cdot (-0,3-3)=3\cdot (-3,3)=-9,9[/tex]
