Instead of subtracting 6 from 12 then dividing they added 6 to 12 & ended up with 18. 18 by 2 is 9.
If I know what you are talking about the answer is 14+14+14+14
First we need to see the pythagorean formula which is

Substituting the given values of a,b , we will get




And

So we have

So the given triangle is a right triangle .
Use the given functions to set up and simplify 4 - 4 : 5.
3 =
4 - 4 : 5 = 0 : 5
Simplifying
12x + -8x = 12
Combine like terms: 12x + -8x = 4x
4x = 12
Solving
4x = 12
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '4'.
x = 3
Simplifying
x = 3