Answer:
f(x)=2x-10 ______(given)
f(x)=8 _______(given)
Therefore, according to the above problem
2x-10=8
2x=10+8
2x=18
x=18/2
x=9
The value of the input of a function given the output is found by reversing
the operations of the function.
When f(x) = 8, x is 9.
Reasons:
The given function is; f(x) = 2·x - 10
Required:
The value of x if f(x) = 8
Solution:
When f(x) = 8, we have;
f(x) = 2·x - 10 = 8
Which gives;
2·x - 10 + 10 = 8 + 10 = 18
2·x + 0 = 18
[tex]x = \dfrac{18}{2} = 9[/tex]
x = 9
When f(x) = 8, x = 9
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