find x

[Psychguy98]

If 1/5 + 1/2 + 1/x = 7, then x =


I Know i need a common denominator which is 10.

 

[Deleted member 4993]

If 1/5 + 1/2 + 1/x = 7, then x =


I Know i need a common denominator which is 10.

First "isolate x" - that is keep terms with 'x' in it on one side and rest on the other side.

 

[Psychguy98]

would that be 10x on both sides?

 

[Deleted member 4993]

would that be 10x on both sides? ..... and do what?

 

[Psychguy98]

multiply the numerator by 10x

 

[Deleted member 4993]

multiply the numerator by 10x

Okay - continue.....

 

[Psychguy98]

Then i can divide to get. 2x + 5x + 10 = 70x

7x + 10 = 70x

- 7x - 7x

10 = 63x divide

x = 10/63

 

[Denis]

Keerect PGuy ... there's hope for you yet :wink: