Solution:
Perimeter (p) of a triangle:
[tex]p = a + b + c[/tex]
P = 73 units
To find the value of x
[tex]73 = 3x + 4x - 1 + x + 2[/tex]
→[tex]73 = 8x + 1 \\ 73 - 1 = 8x[/tex]
→[tex]8x = 72[/tex]
→[tex] \frac{8x}{8} = \frac{72}{8} [/tex]
[tex]x = 9[/tex]
