Answer:
x ≈ 1.987
Explanation:
You want x = side 'a' of triangle ABC with A=35°, C=85°, and b=3 units.
Law of sines
The law of sines tells you side lengths are proportional to the sine of the opposite angle. To find x (side 'a'), we need to know a side and an its opposite angle.
Only one side is give, but the opposite angle is not. Its value is ...
B = 180° -A -C = 180° -35° -85°
B = 60°
Now we know ...
a/sin(A) = b/sin(B)
x = sin(35°)·3/sin(60°) ≈ 1.986927
Side x is about 1.987 units.