- Sat Oct 01, 2011 9:06 pm
- Forum: Pre-Algebra
- Topic: equations: 8x-12=84 ?
- Replies:
**3** - Views:
**2831**

You just need to isolate x; remember to move the variables on one side and the numbers with no coefficients on the other.

- Thu Jul 07, 2011 4:01 pm
- Forum: Pre-Algebra
- Topic: what is 8r+40-5(3r+7) ?
- Replies:
**3** - Views:
**4761**

You must first know whether you are simplifying the expression or solving for a numeric value. In either case, combining like terms is necessary.