The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet. If x represents the width of the rectangle in feet, which equation can be used to find its value?
Answer
A
3 x times x is equal to 16
B
3 x plus x is equal to 16
C
3 x plus 3 x plus x is equal to 16
D
3 x plus 3 x plus x plus x is equal to 16
Explanation
The width is x feet, so the length is 3x feet. Perimeter adds all four sides: 3x + 3x + x + x = 16, which is choice D.
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