Question

For the function f(x) = -12x + 7, find the

matching value for x when f(x) = 17. Write
your answer as a fraction.

Answer 1

`\large\boxed{x=-(5)/(6)}`

Explanation:

f(x) is the same value as y. Therefore, y = 17. We can place this into slope intercept form (except with a defined value for y) and solve for x.

Start by subtracting 7 from both sides. Then, divide by -12 to solve for x. Finally, simplify the fraction.

17 = -12x + 7

10 = -12x

-10/12 = x

-5/6 = x

`\large\boxed{x=-(5)/(6)}`