Explain why it doesn’t matter what letter or symbol is used to find an unknown number

Symbols (or letters) in an equation can be important.

Step-by-Step Explanation:

The symbol [or letter (x, m, n, etc.)] is usually not important because the symbol represents a number. Sometimes it is important because each symbol (or letter) can represent another number.

for example: n+3 = 4-m (the symbol/ letters are different because they represent a different number).

for another example: n+3 = 4 (the symbol/ letter is only one letter).

explanation:

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus