Question

Finding sides of a triangle

Answer 1

Hmm, I haven't done this in ages, but curious, could you just add all 3 equations and set them equal to 180 and find the value of x.

Answer 2

^ And then you plug in x in to each angle's expression and find the value of the angle

Answer 3

2x + 5x - 5 + x + 9
8x + 4 = 180
(-4)
8x = 176
x = ?
Then exactly what @TheSmartOne said! (:

Answer 4

x = 22.
Then you can do
2(22) = ? For Angle L
5(22) - 5 = ? For Angle K
22 + 9 = ? For Angle J
To check if you did it all right, you could add all those 3 values up and you should hopefully get 180 as well.