Ugh. I'm drawing a blank.
Okay. I just need a refresher on this stuff.
6A - 7C = 9
Here's what I'm doing:
6A - 7C + 7C = 9 + 7C
6A = 9 + 7C
A=(9 + 7C)/6
So far so good, right?
6((9 + 7C)/6) - 7C = 9
Now when I do this I cancel out the "6"'s...maybe that's wrong?
9 + 7C - 7C = 9
7C - 7C = 9 - 9
...okay...I just did some stuff and found that 7C = 9...and that seems to fit... I solved it but...other than just taking a potshot like I did...
How can I go from 7C - 7C = 9 - 9 and get 7C = 9 correctly?
Am I even doing the equation right altogether?
It's been a little while since I've done this math but I wanted to kinda get back up to speed. Thanks in advance for any help!