We have an 180 degree line, so lets solve.
180 - 39 = 141
n = 141 degrees
Answer: N = 141<span>°</span>
I guess this is the answer
then:
x=9
The interior angles of a triangle add up to 180 degrees.
(2x - 10) + (x + 30) + 70 = 180...combine like terms
3x + 90 = 180
3x = 180 - 90
3x = 90
x = 90/3
x = 30
m < A = 2x - 10 = 2(30) - 10 = 60 - 10 = 50 <== m < A