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Subjects
Class 10MathematicsPair of Linear Equations in Two VariablesAlgebraic methods: Substitution method and Elimination method.ExpertLevel 56

If (4x+ky=26) and (4x-3y=2) have solution (y=4), what is (k)?

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Answer and explanation

Correct answer: (3)

Putting (y=4) in the second equation gives (x=\frac{7}{2}). Then (14+4k=26), so (k=3).

Tags

pair-linear-equationsparametersubstitution

Frequently asked questions

What is the correct answer to this question?

(3)

Why is this the correct answer?

Putting (y=4) in the second equation gives (x=\frac{7}{2}). Then (14+4k=26), so (k=3).

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Pair of Linear Equations in Two Variables. Topic: Algebraic methods: Substitution method and Elimination method..

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