The perimeter of the rectangle is 19.4 meters. The length is 0.8 meters less than twice the width. How many meters are the length and width of the rectangle?

The perimeter of the rectangle is 19.4 meters. The length is 0.8 meters less than twice the width. How many meters are the length and width of the rectangle?

Let the width of a rectangle be x meters, then the length is (2x-0.8) meters. According to the meaning of the title, we can get the equation: (x + 2x-0.8) × 2 = 19.4, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 6x-1.6 = 19.4, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp

The circumference of a rectangle is 19.2 meters, and its length is three times of its width. How many meters are the length and width of the rectangle

Let the length be 3x and the width be x, then:
3x+x=19.2/2=9.6
So x = 2.4 (m)
So 3x = 7.2 (m)
So it's 7.2 meters long and 2.4 meters wide

The circumference of a rectangle is 72 meters, the length is 21 meters, and the width is how many meters?

72÷2-21
=36-21
=15 (m)
A: the width is 15 meters
Let the width be x meters
2（21+x）=72
42+2x=72
2x=30
x=15
A: the width is 15 meters