Question

Sixteen is divided y the sum of a number q and 1. The result is four. what is the number?

Answer 1

16/(q+1)=4
(Multiply both sides by the quantity (q+1))
16=4(q+1)
(Distribute the 4)
16=4q+4
(Subtract 4 from both sides to isolate the variable)
12=4q
(Divide both sides by 4)
3=q

Hope this helps!