Question

The perimeter of an equilateral triangle is 63 inches. If the length of each side is (3x-9), find the value of x.

Answer 1

x=

Explanation:

There are 2 ways to do this.

4(3x-9)=63; 12x-36=63; 12x=99; x=8. Or: (3x-9)+(3x-9)+(3x-9)+(3x-9)=63; 12x-36=63; 12x=99; x=