Question

Someone help me please!

Answer 1

Remember, all inside angles in a triangle add up to 180°

So:

3x+5x+7+x+2=180

Combine like terms

9x+9=180

Subtract 9 from both sides

180-9=171

9x=171

Divide by 9 on both sides

171/9=19

x=19

Plug it into all the angle measures.

Angle X: x+2, 9+2=11, Angle X=11°

Angle Y: 5x+7, 5(9)+7=52, Angle Y=52°

Angle Z: 3x, 3(9)=27, Angle Z=27°