Question

The perimeter of the triangle below is 73 units. Find the value of x.

Answer 1

Solution:

Perimeter (p) of a triangle:

`p = a + b + c`

P = 73 units

To find the value of x

`73 = 3x + 4x - 1 + x + 2`

→
`73 = 8x + 1 \\ 73 - 1 = 8x`

→
`8x = 72`

→
`(8x)/(8) = (72)/(8)`

`x = 9`

Answer 2

3x+4x-1+x+2=73

8x+1=73

8x=73-1

8x=72

8x/8=72/8

x=9