Write the expression as an equivalent algebraic expression involving only x.

The given expression is

We need to determine the expression as an equivalent algebraic expression involving only x.

The expression has to be expressed as an algebraic expression in x.

Thus, we have;

Using the identity in the above expression, we get;

Simplifying, we get;

Hence, the expression can be written as

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

nswer: a   y-axis

step-by-step explanation: