Algebra1
posted by R .
How to do work out C+4=24

I assume you want the value for C. When you have an equation, as long as you do the same thing to each side, it remains true. So,
C+4 = 24
You want C by itself, so if you subtract 4 from both sides, you have
C+44 = 244
44=0, and of course, C+0 is just C, yo now you have
C = 244
or,
C = 28