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प्रश्न
Solve the pairs of equations :
`3/x + 2/y = 10`
`9/x - 7/y = 10.5`
बेरीज
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उत्तर
`3/x + 2/y = 10` .....(1)
`9/x - 7/y = 10.5` .....(2)
Multiplying equation (1) by 3, We get
`9/x + 6/y = 30` ......(3)
Subtracting (2) from (3), We get
`9/x + 6/y = 30`
- `9/x - 7/y = 10.5`
- + -
`13/y = 19.5`
`y = 13/19.5 = 2/3`
From (1),
`3/x + [ 2 xx 3 ]/2 = 10`
⇒ `3/x + 3 = 10`
⇒ `3/x = 7`
⇒ x = `3/7`
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