justify the steps in the solution below using the properties of real numbers and of equality

Question

12x -7 = 29

12x - 7 + 7=29 +7

12x + 0 = 36

12x = 36

12x/12 = 36 /12

1x=3

x=3

Answer 1

Hi again Travina;

12x -7 = 29

Let's add 7 to both sides...

12x - 7 + 7=29 +7

Let's add the numbers together...

12x+0=36

12x + 0 = 36

We do not need the zero...

12x = 36

Let's divide both sides by 12...

12x/12 = 36 /12

Let's note that 12/12=1

Let's note that 36/12=3

 

1x=3

Let's note that 1x=x

x=3

No further attention is required.