SOLUTION: if (x+y) varies directly as (x-2y)and k is the constant of variation,find x in terms of y and k.

SOLUTION: if (x+y) varies directly as (x-2y)and k is the constant of variation,find x in terms of y and k.

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Question 255908: if (x+y) varies directly as (x-2y)and k is the constant of variation,find x in terms of y and k.
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
From the problem, we get

now expand the right side to get

subtract kx and y from both sides to get

factoring, we get

dividing, we get

a restriction is that k cannot = 1
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