In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
f(x) = 5x + 50
f(x) = 20
x = ?
Step 02:
function:
20 = 5x + 50
20 - 50 = 5x
- 30 = 5x
- 30 / 5 = x
- 6 = x
The answer is:
x = - 6
