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Mathematics

Solution of equations x2y3=0 and x2+y3=6\dfrac{x}{2} - \dfrac{y}{3} = 0 \text{ and } \dfrac{x}{2} + \dfrac{y}{3} = 6 is :

  1. x = 6, y = -9

  2. x = 6, y = 9

  3. x = -6, y = -9

  4. x = -6, y = 9

Linear Equations

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Answer

Given,

Equations :

x2y3=0……….(1)x2+y3=6……….(2)\Rightarrow \dfrac{x}{2} - \dfrac{y}{3} = 0 ……….(1) \\[1em] \Rightarrow \dfrac{x}{2} + \dfrac{y}{3} = 6 ……….(2)

Adding equations (1) and (2), we get :

x2y3+x2+y3=0+62x2=6x=6.\Rightarrow \dfrac{x}{2} - \dfrac{y}{3} + \dfrac{x}{2} + \dfrac{y}{3} = 0 + 6 \\[1em] \Rightarrow \dfrac{2x}{2} = 6 \\[1em] \Rightarrow x = 6.

Substituting value of x in equation (1), we get :

62y3=0……….(1)62=y3y3=3y=9.\Rightarrow \dfrac{6}{2} - \dfrac{y}{3} = 0 ……….(1) \\[1em] \Rightarrow \dfrac{6}{2} = \dfrac{y}{3} \\[1em] \Rightarrow \dfrac{y}{3} = 3 \\[1em] \Rightarrow y = 9.

Hence, Option 2 is the correct option.

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