15-X
4-(n/7) *the foreward slash represents the divided by sign
11-n
17 - y
Opposite of the sum is not a mathematical expression and I can only assume it means the difference.So,5x - x < |x - 5|Or 4x
r/2-8
It can be: x-7
4-(n/7) *the foreward slash represents the divided by sign
Let the number be x and so the expression is: x-19
A variable is a single letter that represents a number. For example x is a variable.An algebraic expression can contain variables, numbers, mathematical symbols, etcetera. An example of an algebraic expression is 3x+12.
11-n
As an expression it is: x-6
When a number is decreased by another number subtraction is the mathematical process used. When a number is increased by another number the user added numbers together.
4y
x-(x+4)
17 - y
a number decreased by 1
5-x=2