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The 3rd grade classroom has a perimeter of 130 feet. if it is 25 feet wide, how many feet long is the classroom

User Naribo
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1 Answer

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Let W be the wide and L the length of the classroom, then we can write


2* W+2* L=130

Since W=25 feets, we get


\begin{gathered} 2*25+2* L=130 \\ 50+2* L=130 \end{gathered}

If we move 50 to the right hand side as -50, we obtain


2* L=130-50

since 130-50=80, we get


2* L=80

Now, if we move the coefficient 2 to the right hand side, we obtain


\begin{gathered} L=(80)/(2) \\ L=40 \end{gathered}

that is, the lenght of the classroom is equal to 40 feets.

The 3rd grade classroom has a perimeter of 130 feet. if it is 25 feet wide, how many-example-1
User Xno
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