Question

Hi! Please help. (Using if-then moves in solving equations)

One side of a triangle is 5 units more than a second side.
The third side is 2 times the length of the second side.
The perimeter of the triangle is 15 units.
Write and solve an equation to find the lengths of all three sides on the traingle

Answer 1

let x be the second side

x+5

x

2x

4x+5=15

4x=10

x= 2.5

first side 7.5

'' '' 2.5

'' '' 5

Explanation: