Answer:
a) x = 6
b) KI = 20
Explanation:
We have that:
KI = 2x + 8
And
KI = KJ + JI
In which:
KJ = 8
JI = x + 6
So
KI = KJ + JI
2x + 8 = 8 + x + 6
2x + 8 = x + 14
2x - x = 14 - 8
x = 6
So, the answer for a is x = 6.
For b:
KI = 2x + 8 = 2*6 + 8 = 12 + 8 = 20
So KI = 20