evaluate xy - y/x for x = 6 and y = 12

[Star eyes]

xy- y/x for x=6 and y=12. I know the answer is 70 but I don'y understand how they get the answer. thanks for your help.

 

[Hockeyman]

Plug in 6 for all the x's you see and 12 for all the y's you see and solve. Nothing too hard.

 

[Mrspi]

xy- y/x for x=6 and y=12. I know the answer is 70 but I don'y understand how they get the answer. thanks for your help.

Do you mean this?
(xy - y) / x

Or do you mean this?
xy - (y/x)

It DOES make a difference!

Substitute 6 for x and 12 for y, and do the arithmetic. But, be sure that you are following the correct order of operations, depending on what your original expression really was.

 

[Guest]

Do you mean this?
(xy - y) / x

Or do you mean this?
xy - (y/x)

It DOES make a difference!

Ok, Yes they do make a difference

(xy - y) / x = (6 * 12 - 12) / 6 = (72 - 12) / 6 = 60 / 6 = 10
xy - (y/x) = 6 * 12 - 12 / 6 = 72 - 2 = 70

So I'm guessing it's the second equation
Sorry I gave out the whole answer, hope you understand the concept