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 simplified form of (10 - [3x - 2(4 - x)])?

Answer and explanation

Correct answer: 18 - 5x

The governing concepts are the distributive law and the rule that a minus sign outside brackets changes the signs of every term inside. Begin with the innermost product: 2(4 − x) = 8 − 2x. The square-bracket expression is therefore 3x − (8 − 2x) = 3x − 8 + 2x = 5x − 8. Substituting into the complete expression gives 10 − (5x − 8). Apply the outer subtraction to both terms: 10 − 5x + 8 = 18 − 5x. Therefore option B is correct. Option A does not combine the x-terms correctly. Option C reverses the effect of the outer subtraction, and option D ignores the coefficient 5 formed from 3x + 2x.

Related tags

Square-BracketsDistributive-LawSign-RulesMathematicsClass 9 McqAlgebraic ExpressionsIntroduction To Polynomials

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.