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Pair of Linear Equations in Two Variables

RD Sharma

CBSE

Grade 10

Question:

Find $k$ if $x = 2, y = 1$ is a solution of $2x + 3y = k$.

Step-by-Step Solution

Key Concept: $2(2) + 3(1) = 4 + 3 = 7 \Rightarrow k = 7$.

$k = 2(2) + 3(1) = 4 + 3 = 7$. [2.0 Marks]

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🎯 Official CBSE Marking Scheme:
Substituting $(2,1)$ to get $k = 7$: 2.0 Marks

Correct Answer:

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