Question

Given f(x) = 3x + 1, solve for x when f(x) = 7.

Answer 1

Answer:

f(7) = 22 or x =2

Step-by-step explanation:

1. f(x) = 3x + 1
2. f(7) = 3(7) + 1
3. f(7) = 21 + 1
4. f(7) = 22

Or if the equation meant it like this:

1. f(x) = 3x + 1
2. 7 = 3x + 1
3. 6 = 3x
4. 2 = x

Answer 2

Answer:

f(7) = 22

Step-by-step explanation:

1. f(x) = 3x + 1

2. f(7) = 3(7) + 1

3. f(7) = 21 + 1