ОЧЕНЬ ПРОШУ))))7 класс УРАВНЕНИЯ

$\displaystyle 1)..\frac{x}{6}- \frac{2}{3}= \frac{2}{3} \\ \\ \frac{x}{6}= \frac{2}{3}+ \frac{2}{3} \\ \\ \frac{x}{6}= \frac{4}{3} \\ \\ 3x=24 \\ x=8 \\ \\ \\2).. \frac{4x}{3}= \frac{x}{4}+1 \frac{1}{4} \\ \\ \frac{4x}{3}- \frac{x}{4}= \frac{5}{4} \\ \\ \frac{16x-3x}{12}= \frac{15}{12} \\ \\ 13x=15 \\\\ x=1 \frac{2}{13} \\ \\ \\ 3)..ax=9 \\ x=-3;npu:a=-3 \\ x=1/9;npu:a=81 \\$
∅; при а = 0

$\displaystyle 4).. \\ a)..npu:x=-11 \\ 3x=-33 \\ \\ b)..npu:y=0 \\ 5y=0 \\ \\ c)..npu:z=14 \\ \\ \frac{2}{7}z=4 \\ \\ 5).. \frac{4x}{5}+3 \frac{1}{7}=11 \frac{5}{7} \\ \\ \frac{4x}{5}=11 \frac{5}{7}-3 \frac{1}{7} \\ \\ \frac{4x}{5}= \frac{60}{7} \\ \\ 28x=300 \\ \\ x=10 \frac{5}{7}$