Question

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

Answer 1

2x+y=7,5
y=2,1
2x+2,1=7,5
2x=7,5-2,1
2x=5,4
x=5,4/2
x=2,7