How do I solve #3x + 6 = 9#?
First of all I will use the shortcuts. After that I will show what is actually happening. This will help in all sorts of ways.
Move the 6 to the other side of the = and change its sign giving:
Move the three to other side of the = sign
Because it is multiply on the left it becomes divide on the right
The best way is to explain it as I go along
Get just the x-terms on the left. In this case there is only 1
and that is
Subtract 6 from both sides
but +6 and -6 is 0 giving
but 9-6 is 3 giving
Now lets get rid of the 3 in
Divide both sides by 3 giving
1 times anything is itself so