X + y=-4 X +2y=13 Using elimination method

1 answer:

6 0

$\begin{array}{lrlll}
x+y=-4&\times -1\implies &-x-y=4\\
x+2y=13&\implies &\ x+2y=13\\
&&\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\\
&&\boxed{?}+\boxed{?}=\boxed{?}
\end{array}$

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My friend sets out walking at a speed of $3$ miles per hour. I set out behind her $5$ minutes later at $4$ miles per hour. When

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Since I started 5 minutes after than my friend, so we are to find the distance travelled by my friend in 5 minutes.

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In 1 minute, distance travelled by my friend is

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