how do I work out 7(c-2)=

Just distribute the 7 across the two terms inside......this will give us....

7c - 14

And that's it !!!

Thats pretty simple!Just have to write one single small step see:

$$7(c-2)$$

$$=7c-14$$  $$ANSWER$$

I jope uve understood by now but if not then pls be free to ask!

i hope this helps!