The lenght of a rectangle is 2 cm less than 7 times the width. the perimeter is 60 cm . find the width and lenght

First, you want to establish your equations.

L=7W-2
P=60

This is what we already know. To find the width, we have to plug in what we know into P=2(L+W), our equation to find perimeter.

60=2(7W-2+W)

Now that we only have 1 variable, we can solve.

First, distribute the 2.
60=14W-4+2W

Next, combine like terms.

60=16W-4

Then, add four to both sides.

64=16W

Lastly, divide both sides by 16

W=4

To find the length, we plug in our width.

7W-2

7(4)-2

28-2

L=26

1= 35

2= 65

3= Id.k sorry

4= 115

5= 65

6= 144

7= 36

Step-by-step explanation:

180 - 115 = 65

2 = 65

65 + 80 = 145

180 - 145 = 35

1 = 35

5=65

65 + 61 = 126

126 - 90 =36

7=36

180 - 36 = 144

6=144

180 - 65 = 115

4 = 115