[latex]x+2frac{1}{2}=-1\ \ x=-1-2frac{1}{2}\ \ x=-3frac{1}{2}\ \ ----------------------\ \ 2x=frac{75}{10}\ \ 2x=frac{15}{2} |*frac{1}{2}\ \ x=frac{15}{4}\ \ x=3frac{3}{4}\ \ ----------------------\ \ x-5,2=-2\ x=-2+5,2\ x=3,2\ \ ----------------------\ \ 3frac{1}{2}x=2\ \ frac{7}{2}x=2 |*frac{2}{7}\ \ x=frac{4}{7}\[/latex] [latex]----------------------\ \ -frac{1}{3}x=-frac{1}{2} |*(-3)\ \ x=frac{3}{2}\ \ x=1frac{1}{2}\ \ ----------------------\ \ frac{2}{5}x=-1 |*frac{5}{2}\ \ x=-frac{5}{2}\ \ x=-2frac{1}{2}[/latex]
x+2 1/2 = -1 x+5/2 = -1 / · 2 2x+5= -2 2x= -2-5 2x = -7/ : 2 x = -7/2 x = -3 1/2 2x=7,5 / : 2 x=3,75 x-5,2 = -2 x = -2+5,2 x = 3,2 3 1/2 x =2 7/2 x =2 / · 2 7x=4 / : 7 x = 4/7 -1/3 x = -1/2 / · 6 -2x= -3 / :(-20 x=3/2 x=1 1/2 2/5 x = -1 / · 5 2x = -5 / : 2 x= -5/2 x= -2 1/2
