Solve for x. 3x + 3 = 12 solve for x. /4+4=8
show your work.

Remember you can do ANYTHING to an eqyation as long as you do it to BOTH SIDES (except divide by zero)

tr to isolate the unknown by itself

 
3x+3=12
minus 3 both sides
3x+3-3=12-3
3x+0=9
3x=9
divide by 3
x=3

x/4+4=8
minus 4
x/4=4
multiply 4
x=16

3x + 3 = 12

To solve these type of equations, we need to apply the inverse operation to both sides of the equation. Next, we'd isolate the variable. 

Here's how it's done:

3x + 3 = 12
       - 3     -3

Notice, we subtracted 3 from both sides. 

3x = 9 
3x/3 = 9/3
x = 3

Now for the other:
 x/4+4=8
       - 4  -4

8 - 4 = 4

x/4 = 4
x/4 * 4/1 = 4 * 4
x = 16

We're officially done: 

1st one: x = 3
2nd one: x = 16