Answer:
94
Explanation:
∠JKL and ∠JML are supplementary( they add to 180°).
Set their values equal to 180 to find the value of x.
15x - 19 + 13x + 3 = 180
Combine like terms
28x - 16 = 180
Add 16 to both sides to isolate the x
28x = 196
Divide both sides by 28
x = 7
Substitute the value of x into the expression for ∠JML
13(7) + 3 = ∠JML
91 + 3 = ∠JML
94° = ∠JML
To check our answer we can substitute the value of x into the expression for ∠JKL and if they add up to 180 we are correct
15(7) - 19 =∠JKL
105 -19 =∠JKL
86 =∠JKL
94° + 86° = 180°
Therefore we are correct