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Solve: x + y = 2xy x - y = 6xy - Mathematics

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Question

Solve:

x + y = 2xy

x - y = 6xy

Sum

Solution

x + y = 2xy                  ...(1)

x - y = 6xy                   ...(2)

Adding equation (1) and (2)

     x + y = 2xy
+  x - y = 6xy 
   2x = 8xy

2 = 8y

y = `1/4`

From (1)

`x + 1/4 = 2x (1/4)`

`x + 1/4 = x/2`

`x-x/2=(-1)/4`

`(2x-x)/2=(-1)/4`

`x/2=(-1)/4`

x = `(-2)/4`

x = `(-1)/2` 

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Equations Reducible to Linear Equations
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Chapter 6: Simultaneous (Linear) Equations (Including Problems) - Exercise 6 (D) [Page 88]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 6 Simultaneous (Linear) Equations (Including Problems)
Exercise 6 (D) | Q 7.1 | Page 88
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