Question

Evaluate f(x) = 3x - 6:
a) x = -4
b) f(x) = 36.

Answer 1

A) -18

B) 14

Explanation:

A:

f(x) = 3x -6

f(-4) = 3(-4) - 6

f(-4) = -12 - 6

f(-4) = -18

B:

36 = 3x - 6 Add 6 to both sides

36 + 6 = 3x - 6 + 6

42 = 3x Divide both side by 3

`(42)/(3)` =
`(3x)/(3)`

14 = x