Question

What value of x results in f(x) = 1 given the
function f(x) = 9 - 4x?

Answer 1

x = 2

Explanation:

f(x) = 9 - 4x

1 = 9 - 4x

~Subtract 9 to both sides

-8 = -4x

~Divide -4 to both sides

Best of Luck!

Answer 2

2 =x

Explanation:

f(x) = 9 - 4x

Let f(x) = 1

1 = 9 -4x

Subtract 9 from each side

1-9 = 9-4x-9

-8 = -4x

Divide by -4

-8/-4 = -4x/-4

2 =x