Question

The sides of a triangle in cm, are , x , 2x – 5 and 2x – 3 . The perimeter of the triangle is 32 cm . i) Write down an equation for x

Answer 1

9514 1404 393

Answer:

32 = (x) +(2x -5) +(2x -3)

Explanation:

The perimeter is the sum of the side lengths:

P = a + b + c

32 = (x) +(2x -5) +(2x -3)

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This can be simplified to ...

32 = 5x -8

and solved to find x:

x = (32 +8)/5 = 8