12. The perimeter of the following triangle is 60 inches. Find the lengths of the sides.

2x + 5

2x+5

5x + 5

Lengths of the sides in the given order

15 inches

15 inches

30 inches

Step-by-step explanation:

The total of the sides,

(2x + 5) + (2x + 5) + (5x + 5) ... then add the variables with x together and those without x together.

; 9x + 15

Hence if the perimetre of the triangle is 60 in

then ...; 9x + 15 = 60

; 9x = 45

; Hence the variable ..., x = 5

Lengths of the sides,

Substitute the value of x into the given lengths of the sides,

2 (5) + 5 = 15 inches

2 (5) + 5 = 15 inches

5 (5) + 5 = 30 inches