Question

The isosceles triangle has a perimeter of 7.5m. Which equation can be used to find the value of x if the shortest side, y, measures 2.1 m?

Answer 1

2.1 +2x=7.5
2x=7.5-2.1
2x=5.4
x=2.7

Answer 2

2.1 +2x=7.5

Explanation: