the perimeter of the triangle is 61 inches. if two sides of the triangle are equal and the third side is 4 inches more than the equal sides, what is the length of the third side?

The equation can be modeled as

X + X + (X+4) = 61

X is used for all because they are all the same number and can be given the same variable

The third is given plus four so we can use a common variable

3x + 4 = 61

3x = 57 (subtracted four)

x = 19 (divided by three)

Solving for third side so x + 4

The third side is 23 inches