Pomuszczie plis ja to mam na jutro ! HELP ME ! Jak obliczyć te zadania powiccie :( PLS -_- 3x-2x=30 0,3x=6 x/9=0,27 -(x-4)=0,2 -2(x-5)=1 x/2-x/4=8 2 1/2x=4 x/7=2 1/5 HELP daje NAJ ALE PLSI POMOCY !

[latex]3x-2x=30 \ x=30[/latex] [latex]0,3x=6/:0,3 \ x=20[/latex] [latex] frac{x}{9} =0,27/*9 \ x=2,43[/latex] [latex]-(x-4)=0,2 \ -x+4=0,2 \ -x=0,2-4 \ -x=-3,8/*(-1) \ x=3,8[/latex] [latex]-2(x-5)=1 \ -2x+10=1 \ -2x=1-10 \ -2x=-9/:(-2) \ x= frac{9}{2} \ x=4 frac{1}{2} [/latex] [latex] frac{x}{2} - frac{x}{4} =8/*8 \ 4x-2x=64 \ 2x=64/:2 \ x=32[/latex] [latex]2 frac{1}{2} x=4 \ frac{5}{2} x=4/*2 \ 5x=8/:5 \ x= frac{8}{5} \ x=1 frac{3}{5} [/latex] [latex] frac{x}{7} =2 frac{1}{5} \ \ frac{x}{7} = frac{11}{5} \ \ 5x=77/:5 \ \ x= frac{77}{5} \ \ x=15 frac{2}{5} [/latex]