Вправа 833 алгебра Бевз гдз 7 клас
$$\begin{aligned}
&\text { № } 833\\
&\begin{aligned}
& \text { a) } \frac{8-3 y}{5}-\frac{1-2 y}{2}=\frac{6 y+17}{10} \\
& \frac{2(8-3 y)-5(1-2 y)}{10}=\frac{6 y+17}{10} \\
& 2(8-3 y)-5(1-2 y)=6 y+17 \\
& 16-6 y-5+10 y=6 y+17 \\
& 4 y+11=6 y+17 \\
& -2 y=6 \\
& y=-3
\end{aligned}\\
&\begin{aligned}
& \text { б) } \frac{2-4 x}{5}=\frac{1-2 x}{2}+\frac{x+3}{4} \\
& \frac{2-4 x}{5}=\frac{4(1-2 x)-3(x+3)}{12}
\end{aligned}\\
&\begin{aligned}
& 12(2-4 x)=6(4-8 x-3 x-9) \\
& 24-48 x=5(-11 x-5) \\
& -48 x+55 x=-25-24 \\
& 7 x=-49 \\
& x=-7
\end{aligned}
\end{aligned}
$$
вправи поруч
