Respuesta :

apologiabiology
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

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