U=110, V= 75 and the angle between u and v is 120 degree. Find u+3v

We'll the answer is x=4

How I found it:
1st I converted mixed numbers into improper fractions
2nd Multiplied both sides by 2
-(x+2)+3x=6
2x-2=6
then i added 2 to both sides
2x=8
then to get rid of 2 from x, i divided 2x/2=8/2
and then my answer became x=4
I hope this helps you out. Good Luck =)