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

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What is the value of (y) from (7x+2y=16) and (4x-2y=17)?

Answer and explanation

Correct answer: (y=-\frac{13}{22})

Adding both equations gives (11x=33), so (x=3). The first equation gives (21+2y=16), so (y=-\frac{5}{2}), hence no option is correct.

Related tags

Linear Equations Elimination Negative Fraction Hard Class 10 Algebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination Method Pair Of Linear Equations In Two Variables

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