Question

The angles of a triangle are (x + 21) degree , x degree and (2x - 45) degree. find the value of x.​

Answer 1

Answer:

Step-by-step explanation:

So, we know that all angles in a triangle add up to 180 degrees

So,

(x+21)+x+(2x-45)=180

→x+21+x+2x-45=180

→4x-24=180

→4x=180-24

→x=156/4→39

Answer 2

Step-by-step explanation:

x+21+x+2x-45 = 180

4x-24 = 180

4x = 156

x=39