x would equal the first option, 6.
As lines AC and BD are parallel, we can say that angles FGC and GHD are equal as corresponding angles, which are angles that are formed by an 'F' shape, are equal. This means we can write an equation and solve it:
5x - 10 = 3x + 2
- 3x
2x - 10 = 2
+ 10
2x = 12
÷ 2
x = 6
I hope this helps!
