0.17
Explain: looked it up and also use Symbolab it’s a math calculator
65-14=65-5-x
x=9
Explanation=
65-14=65-5-x
51=60-x
-9=-x
9=x
2.8 because 14/5 equals 2 80/100.
This expression is easier than it looks like. I thought that to solve it you have for example to express the 2 via 10 * 5^-1 and stuff like that - but you can multiply and divide this expression by some factor. In our case first we multiply by conjunctive expression root(5-2root2) and the second by root(6+2root5). In first we get root16 and the second calculate.