Question

F(x)=-1/3x+7 Determine the input that would give an output value of 2/3.

2/3= -1/3x+7
-19/3=-1/3x

X=

Answer 1

x = 19

Explanation:

To solve for x, set f(x) equal to the output value, hence

-
`(1)/(3)` x + 7 =
`(2)/(3)`

Multiply all terms by 3 to eliminate the fractions

- x + 21 = 2 ( subtract 21 from both sides )

- x = - 19 ( multiply both sides by - 1 )

x = 19