Question

Which equation can you use to find the value of x?

3xº
(x - 2)°


answer : 3x=78+x-2

Answer 1

`3x=78+(x-2)`

Explanation:

The complete question in the attached figure

we know that

The Triangle Exterior Angle Theorem states that: An exterior angle of a triangle is equal to the sum of the opposite interior angles.

In this problem

`3x=78+(x-2)`

solve for x

`3x=76+x\\3x-x=76\\2x=76\\x=38^o`