Answer
$3x+12$
Work Step by Step
We are given the statement $3(x+4)=3x+4$, which is an incorrect application of the distributive property.
The distributive property holds that $a(b+c)=ab+ac$.
In this example, $a=3$, $b=x$, and $c=4$, so the statement should be $3(x+4)=3\times x+3\times4=3x+12$
