Question

How would i solve 21=9+q

Answer 1

Bring 9 to the other side of the =
21-9= 12
q=12

Answer 2

q = 12 i hope this helps you! :)

Explanation:

you should take the 9 from both sides leaving you with the following equation

12 = q

you need to flip the equation around to have the variable on the left side of the equation

q = 12