The formula for the number of degrees of an external polygon is
360/n where n is the number of sides
octogon has 8 sides
360/8=45
answer is 45 degrees
It all depends on the importance of the variable its self. Its important to solve it so you know what the variable is and its important to solve one at a time because its impossible to solve a variable completely if you have two of them
Answer:

Step-by-step explanation:
So we have the equation:

Combine like terms:

Add 4 to both sides. The left side cancels:

Divide both sides by 8:

Thus, the value of x is 5.