When dividing with fractions, you "keep, change, and flip" the problem.
This means that the 4 becomes 1/4, so they are equal to each other.
What it looks like:
÷ 4 ->
x 
= keep
÷ = change to x
4 = flip to 
3x + 50 = 6x -10
add 10 to each side
3x +60 = 6x
subtract 3x from each side
60 = 3x
x = 60/3 = 20
x = 20
Dude triangle is qpt and qrt where did the side s come from ,at least provide the fig
5.5/4=x/100
4x=550
x=137.5
the water tower is 137 ft. 6 in. tall.