The perimeter of a rectangle is $86 cm$ . If the length is $25 cm$ , how wide is the rectangle?
A) First write an equation you can use to answer this question. Use $w$ as your variable in the equation.
The equation is
B) Solve your equation in part [A] to find the width of the rectangle.
Answer: The rectangle is $cm$ wide.
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Final Answer: The width of the rectangle is $18$ cm.

Steps

Step 1 ：The perimeter of a rectangle is given by the formula $2 \times (length + width)$ . We know the perimeter is 86 cm and the length is 25 cm.

Step 2 ：We can set up the equation $2 \times (25 + w) = 86$ , where $w$ is the width of the rectangle.

Step 3 ：Solving this equation will give us the width of the rectangle.

Step 4 ：Final Answer: The width of the rectangle is $18$ cm.