Answer:
EF = 8
Explanation:
F is the midpoint of EG. So, the distance of EF and GF will be same and if we add EF and GF, it will give the total distance of EG.
GF = EF
GF = x + 3
EG = GF + EF
Substitute the value of EG, GF and Ef in the above equation.
3x + 1 = x + 3 + x + 3
Combine the like terms in the RHS,
3x + 1 = 2x + 6
Subtract 1 from both sides,
3x = 2x + 6 - 1
3x = 2x + 5
Subtract 2x from both sides,
3x - 2x = 5

Now, we can find EF.
EF = x + 3
= 5 + 3
= 8
Answer: EF = 8