Answer :
Step-by-step explanation:
[tex]f(x)=14x+42[/tex]
[tex]f(x)=35[/tex]
Given the information above, we can simply set up an equation so we can find the value of x.
[tex]14x + 42 = 35[/tex]
Subtract 42 on both sides.
[tex]14x=-7[/tex]
Divide 14 on both sides.
[tex]x=-\frac{1}{2}[/tex]
So, the value of x is equal to -1/2 when f(x) is 35.