The table given are for the linear functions f(x) and g(x) what is the input value for which f(x) = g(x) is true ?
x=

Do you have trouble comparing the values in one table to those in the other?

f(x) = 3 for all values of x, so you only need to find the entry in the g(x) table where g(x) = 3. The corresponding x-value is
.. x = -1