Our current equation is:
3x + 5.
Our value of x is 4, so we need to put the value of x in parenthesis.
3(4) + 5
3(4) means 3*4 or 3•4, meaning to multiply.
3(4) = 12.
We now have:
12 + 5
Add up our numbers.
17 is your sum and final answer.
I hope this helps!