7x + 9=51 solve the equation fro the varialbe x?

Hi,

For this question, subtract 9 from both sides of the equation to get:

7x = 42

Now, divide both sides by 7 to get:

x = 6 <==== FINAL ANSWER

I hope that helps you out! Please let me know if you have any other questions!

7x + 9=51
7x = 51 - 9
7x = 42
x = 42 / 7
x = 6

7x + 9 = 51
subtract 9 to both sides
7x = 42
divide both sides by 7
x = 6

7x+9=51
7x+9-9=51-9
7x=42
x=6

7x = 42

x = 6

Please approach a class IV student to give you the best answer as already many people ahve mentioned these same lines and note sure if asking pretty simple questions really makes any sense:
nonetheless:
as a general rule get the variables to one side and numerals to another side:
7x = 51 - 9 = 42
:. x = 6
Hope this explanation helps

7x + 9 = 51
7x = 42
x = 6.

7x + 9 = 51
7x = 51 - 9
x = 46/7
x = 6

x=6

7x = 51 - 9
7x = 42
x = 42/7
x = 6