Question

Three is added to a number, and then the sum is multiplied by 4. The result is 16. Find the number.

Answer 1

$x-\ number\\\\ 4(3+x)=16\\ 12+4x=16\ \ \ |Subtract\ 12\\ 4x=16-12\\ 4x=4\ \ \ |Divide\ by\ 4\\ x=1\\\\ \textbf{Number\ is\ equal\ to\ 1.}$

Answer 2

(3+x)*4=16
Distributive property 
12+4x=16
-12       -12
4x-4

x=1