Question

The three sides of a triangle are x - 1, x, and x + 1 meters. Solve for x taking the perimeter of the triangle as 18 meters.

Answer 1

please help!

Answer 2

You can set up this problem as an equation.

(x - 1) + (x) + (x + 1) = 18

First we combine like terms.

(x + x + x) + (1 - 1) = 18

3x = 18

Then slove for x by dividing both sides by 3.

\[\frac{ 3x }{ 3 }=\frac{ 18 }{ 3 }\]

What is 18 ÷ 3?