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Solve for x and y : (xy )/(x + y ...

Solve for x and y :
` (xy )/(x + y ) = ( 6)/(5), (xy)/( y - x) = 6 (x ne 0, y ne 0 and x ne y )`.

A

`x=1 , y=3`

B

`x=2 ,y=2`

C

`x=3 , y=3`

D

`x=2 , y=3`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the equations given in the problem, we will follow these steps: ### Step 1: Write down the equations We have two equations: 1. \(\frac{xy}{x + y} = \frac{6}{5}\) 2. \(\frac{xy}{y - x} = 6\) ### Step 2: Cross multiply the first equation From the first equation, we can cross-multiply: \[ 5xy = 6(x + y) \] This simplifies to: \[ 5xy = 6x + 6y \] ### Step 3: Cross multiply the second equation From the second equation, we cross-multiply: \[ xy = 6(y - x) \] This simplifies to: \[ xy = 6y - 6x \] ### Step 4: Rearranging both equations Now we can rearrange both equations: 1. From \(5xy = 6x + 6y\), we can write: \[ 5xy - 6x - 6y = 0 \quad (1) \] 2. From \(xy = 6y - 6x\), we can write: \[ xy + 6x - 6y = 0 \quad (2) \] ### Step 5: Divide equation (1) by equation (2) Now, we will divide equation (1) by equation (2): \[ \frac{5xy - 6x - 6y}{xy + 6x - 6y} = 0 \] This simplifies to: \[ 5xy - 6x - 6y = 0 \quad \text{and} \quad xy + 6x - 6y \neq 0 \] ### Step 6: Rearranging the divided equation From the division, we can cross-multiply: \[ 5(y - x) = x + y \] This simplifies to: \[ 5y - 5x = x + y \] ### Step 7: Rearranging to isolate variables Rearranging gives: \[ 5y - y = x + 5x \] This simplifies to: \[ 4y = 6x \quad \Rightarrow \quad y = \frac{3}{2}x \] ### Step 8: Substitute \(y\) back into one of the original equations Substituting \(y = \frac{3}{2}x\) into the first equation: \[ 5x\left(\frac{3}{2}x\right) = 6\left(x + \frac{3}{2}x\right) \] This simplifies to: \[ \frac{15}{2}x^2 = 6\left(\frac{5}{2}x\right) \] \[ \frac{15}{2}x^2 = 15x \] ### Step 9: Solve for \(x\) Dividing both sides by \(15\) gives: \[ \frac{1}{2}x^2 = x \] Rearranging gives: \[ \frac{1}{2}x^2 - x = 0 \] Factoring out \(x\): \[ x\left(\frac{1}{2}x - 1\right) = 0 \] Thus, \(x = 0\) or \(\frac{1}{2}x - 1 = 0\) leading to: \[ x = 2 \] ### Step 10: Find \(y\) Substituting \(x = 2\) back into \(y = \frac{3}{2}x\): \[ y = \frac{3}{2} \cdot 2 = 3 \] ### Final Solution Thus, the solution is: \[ x = 2, \quad y = 3 \]

To solve the equations given in the problem, we will follow these steps: ### Step 1: Write down the equations We have two equations: 1. \(\frac{xy}{x + y} = \frac{6}{5}\) 2. \(\frac{xy}{y - x} = 6\) ### Step 2: Cross multiply the first equation ...
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