Answer:
Angle J = 127°
Angle K = 20°
Angle L = 33°
Step-by-step explanation:
Let 6x+7 be angle J, let x be angle K, and let x+13 be angle L.
The angles of a triangle add to 180°, so the equation would be set up like this: (6x+7)+(x)+(x+13)=180
First, combine like terms - 8x+20=180
Next, subtract 20 from each side - 8x=160
Then, to get x by itself, divide by 8 on both sides - x=20
Finally, plug 20 into x to find the measure of each angle:
J: 6(20)+7=120+7=127°
K: 20°
L: 20+13=33°
All angle measures should add to 180°