3x - y = 39x - 3y = 9solve the equation by substitutionmethod only. * let see your knowledge*​

3x−y=3 …………(1)

9x−3y=9 ………..(2)

Substitution method

3x−y=3

y=3x−3 [Put in equation 2]

9x−3(3x−3)=9

9x−9x+9=9

∴ ∞ solutions because both lines same

3x−y=3 ……..(1)

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3(3x−y)=3×

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3 ………. (2)

1=2.