Question

In an isosceles triangle abc a = 5x - 60, b = 2x + 40, c = 3x - 80 . find x

Answer 1

Answer:

x = 28

Step-by-step explanation:

The sum of measure of all angles of a triangle is 180

Angle a + Angle b + Angle c = 180

5x - 60 + 2x + 40 + 3x - 80 = 180

5x + 2x + 3x - 60 + 40 - 80 = 180

10x - 60 - 40 = 180

10x - 100 = 180

10x = 180 + 100

x = 280 / 10

x = 28