Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What is the solution of (x=2y+1) and (x+y=13)?

Answer and explanation

Correct answer: (x=9,\ y=4)

One equation already gives x in terms of y: \(x=2y+1\). This makes substitution the natural method. Replace x by \(2y+1\) in the second equation. Then there is only one unknown, y, so it can be found with ordinary algebra. After finding y, substitute it back into the first relation to find x.

Using substitution, \(x+y=13\) becomes \((2y+1)+y=13\). Combine like terms to get \(3y+1=13\), then subtract 1: \(3y=12\). Dividing by 3 gives \(y=4\). Now \(x=2(4)+1=9\). Checking gives \(9+4=13\), so the solution is \((9,4)\), which is option C. The other choices do not satisfy both equations.

Related tags

Linear EquationsSubstitutionSolution PairEasyClass 10

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.