समीकरण (x+3y=15) और (y=3) से (x) क्या होगा?
From (x+3y=15) and (y=3), what is (x)?
Explanation opens after your attempt
B. (x=6)
Concept
(x+9=15), so (x=6). After substitution, solve the remaining one-variable equation.
Why this answer is correct
The correct answer is B. (x=6). (x+9=15), so (x=6). After substitution, solve the remaining one-variable equation.
Exam Tip
(x+9=15), इसलिए (x=6)। प्रतिस्थापन के बाद शेष एक चर का समीकरण हल करें।
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