Question

I need help, forgot how to answer this?

Answer 1

All three angles in a triangle add up to 180 degrees.

Therefore, we should just add up all the angles given to us and set them equal to 180 :)

3x + 5x + (2x + 5) = 180

Now we just need to combine all the similar terms together (which is the 3x, 5x, and 2x):

10x + 5 = 180

Subtract 5 from both sides of the equation:

10x = 175

Now just divide by 10 on both sides to isolate the x and work out your value:

x = 17.5

Therefore, your final value of x is 17.5 :)