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Class 10 Mathematics Pair of Linear Equations in Two Variables Algebraic methods: Substitution method and Elimination method.Expert

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If the equations 4x + ky = 34 and 4x − 2y = 10 have a solution with y = 3, what is the value of k?

Answer and explanation

Correct answer: 6

Using y = 3 in 4x − 2y = 10 gives 4x − 6 = 10, so x = 4. Substituting x = 4 and y = 3 into the first equation gives 16 + 3k = 34, hence k = 6.

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Algebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination Method Pair Of Linear Equations In Two Variables Mathematics Class 10 Mcq

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