Question

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

A. 88
B. 8
C. 1738
D. 7

Answer 1

To solve for x when f(x)=158 for the function f(x)=70+11x, subtract 70 from 158 and divide the result by 11, which reveals that x equals 8.

Step-by-step explanation:

To find the value of x when f(x) = 158, we need to substitute 158 for f(x) in the given function and solve for x:

f(x) = 70 + 11x

158 = 70 + 11x

To find the value of x, deduct 70 from both sides:

158 - 70 = 11x

88 = 11x

Now, divide both sides by 11:

x = 88 / 11

x = 8

Therefore, the correct answer is B. 8.