6. If x − y/x + y = 7 (x and -y aren't equal), what is the ratio of y to x?

(A) −4/3

(B) 4/3

(C) −3/4

(D) 3/4

Question

6. If x − y/x + y = 7 (x and -y aren't equal), what is the ratio of y to x?

(A) −4/3

(B) 4/3

(C) −3/4

(D) 3/4

anonymous · Answer

is it (x-y)(x+y)=7?

anonymous · Answer

I'm not sure the answer is C but I don't know how to solve it

vocaloid · Answer

lets start over

(x-y)/(x+y) = 7

vocaloid · Answer

multiply both sides by (x+y)

anonymous · Answer

okay

welshfella · Answer

is the question 
x - y
----  =  7   ?
x + y

anonymous · Answer

i think so @welshfella . @taengoo  is what @welshfella  wrote the exact question you have?

anonymous · Answer

yes

anonymous · Answer

after u do what @Vocaloid  wrote u to do, you should get x-y=7(x+y)
simplify this expression first

welshfella · Answer

vocaloids suggestion looks good

anonymous · Answer

x-y=7x+7y

campbell_st · Answer

mu;tiply both sides of the equation by x + y

and you get

x - y = 7(x + y)

now distribute and collect like terms

welshfella · Answer

yes

anonymous · Answer

yes. so now subtract x from both sides and 7y from both sides.

x - y - x - 7y = 7x + 7y - x - 7y

simplify this one

anonymous · Answer

i got it

anonymous · Answer

y=-3/4x

welshfella · Answer

right

anonymous · Answer

yes. that's right.

anonymous · Answer

Can you help me on another one?

anonymous · Answer

of course :)

welshfella · Answer

please re-post another question

anonymous · Answer