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 value of x from x/5 + y/2 = 7 and x/3 − y/4 = 1?

Answer and explanation

Correct answer: x = 135/13

Clear the denominators carefully. Multiplying x/5 + y/2 = 7 by 10 gives 2x + 5y = 70. Multiplying x/3 − y/4 = 1 by 12 gives 4x − 3y = 12. To eliminate y, multiply the first equation by 3 and the second by 5: 6x + 15y = 210 and 20x − 15y = 60. Adding them gives 26x = 270, so x = 270/26 = 135/13. Therefore option B is correct. The other options arise from incorrect least common multiples or a sign error while combining the equations. Substitution of x = 135/13 into the two transformed equations produces the same y value and confirms the solution.

Related tags

Linear-EquationsFraction-CoefficientsEliminationClass-10Algebraic Methods: Substitution Method And Elimination Method.Algebraic Methods Substitution Method And Elimination MethodPair Of Linear Equations In Two VariablesMathematics

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.