Question

Given f(x) = 70 + 11x, find x when f(x) =158

Answer 1

`\huge \boxed{x = 8}`

Explanation:

f(x) = 70 + 11x

To find the value of x when f(x) =158 , equate f(x) to 158

We have

`70 + 11x = 158 \\ 11x = 158 - 70 \\ 11x = 88`

Divide both sides by 11

`(11x)/(11) = (88)/(11) \\`

We have the final answer as

x = 8

Hope this helps you