Answer: 
Step-by-step explanation:
We can rewrite the left hand side as a perfect square, more specifically

So, taking the square root of both sides,

Hello,
If 3x-1>=0 then
x>=1/3
|3x-1\=3x-1
2*|3x-1|=18
2*(3x-1)=18
6x-2=18
6x=20
x=10/3
else
x<1/3
|3x-1|=-(3x-1)
2*|3x-1|=18
2(-(3x-1))=18
-6x+2=18
-6x=16
x=-8/3
endif
Answer:
21
Step-by-step explanation:
tcctvucycyccyctctctchu ycuvuvuvy t r y y g g t g
After he used the 19.5 ft he can get 23 ....3.5 ft
100-19.5 then divide by 3.5 gives u 23