alleryयदि $a + b = 10$ और $a - b = 4$ है, तो $a$ का मान क्या है?
A6
B8
C7
D3
Answer & Solution
Correct answer: C. 7
दोनों समीकरणों को जोड़ने पर: $2a = 14 \implies a = 7$.
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