Question

Given the function f(x) = 2 x + 61 – 4, for what values of x is f(x) = 6?

Answer 1

69

Explanation:

Replace x with 6.

2(6) =12 +61= 73-4=69

Answer 2

x = -51/2

Explanation:

f(x) = 2x + 61 - 4

Since we are looking for the values where f(x) = 6, replace f(x) with 6 in the equation:

6 = 2x + 61 -4

Next combine like terms:

6 = 2x + 57

Then move subtract 57 from both sides to isolate the variable:

-51 = 2x

Finally, divide both sides by two to get x by itself:

x =-51/2