Question

If g(x) = 2(x − 4), find the value of x if g(x) = 20.

Answer 1

We know that:
\[
g(x)=2(x-4)
\]And:
\[
g(x)=20
\]We wish to find such \(x\), so, by transitive property of equality:
\[
20=2(x-4)\implies\\
10=x-4\implies\\
14=x
\]Et voilá.