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4 views
Solve the system:

$$
\begin{aligned}
&4 x-y=5 \\
&x+2 y=8
\end{aligned}
$$
ago in Mathematics by Diamond (78,880 points) | 4 views

1 Answer

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$4 x-y=5$
$\underline{=} \begin{aligned}&x+2 y=8 \\&y=4 x-5 \\&x+2(4 x-5)=8 \\&x+8 x-10=8 \\&9 x=10+8 \\&9 x=18 \\&\underline{x=18: 9=2} \\&y=4 x-5 \\&y=4 \cdot 2-5 \\&y=8-5=3\end{aligned}$
ago by Diamond (78,880 points)

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