I think the answer may be 11
Answer:
angle A = 32
Step-by-step explanation:
angle A = 180 - (58+90) {by angle sum property of a triangle.}
angle A = 32
So 8x+4+4x+8=15x-9
Combine like terms.
12x+12=15x-9
Add 9 to both sides.
12x+21=15x
Subtract 12 from both sides.
21=3x
Divide both sides by 3.
x=7
Now plug in 7 for x in 8x+4.
8(7)+4
56+4
=60
The anwser is one and two tenths
