Answer:I think that the answer is A
Step-by-step explanation:
Check the picture below.
15 degrees
7x-10+6x-5=180
13x=180
x=15
Answer:
n = 18
(2n) and (n + 18) are vertically opposite angles and are congruent, then
2n = n + 18 ( subtract n from both sides )
x= -2/9
2(x-2)/5=4x
2(x-2)=4x*5
2(x-2)=20x
x-2=20x/2
x-2=10x
-2=10x-x
9x= -2
