Here is the inequality you are describing:
10x+4≤25
Where x is the "number" you are describing.
5|8-x|
5|8-10|
= 5|-2|
= 5(2)
= 10
The value of the expression when x = 10 is 10.
You simply need to subtract x from both sides:

In fact solving an equation for a variable means to isolate that variable on one side of the equation, and moving all remaining terms on the other side.
In this case, we solved the equation for y, because we wrote it as 
You're equation will look like:
R = 1167 + 1167 + 1167 - 239
To get the answer, simplify
R = 1167 + 1167 + 1167 - 239 = 3262
~
Answer:
14.1
Step-by-step explanation:
Hey There!
This is a right triangle so we have to use the Pythagorean Theorem to solve for the missing side
given the hypotenuse and a leg we do


then we just round to the nearest tenth and get that
?=14.1