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

If (4x+2y=20) and (x+y=7), what is the value of (x)?

Answer and explanation

Correct answer: (x=3)

Direct answer: option C, \(x=3\). Simplify the first equation by dividing every term by 2: \(4x+2y=20\) becomes \(2x+y=10\). The second equation is \(x+y=7\). Subtract the second from the simplified first: \((2x+y)-(x+y)=10-7\), so \(x=3\). Then \(y=4\), confirming both equations. Option C is correct. Option A would give \(x=1\), which fails the equations. Option B gives 2 and also fails. Option D gives 4; although it would make \(y=3\) from the second equation, it does not satisfy the first. A quick method is to remove common factors before elimination.

Related tags

Linear EquationsEliminationSimplify FirstEasyClass 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.