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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Solve: 21 – 3 (X – 7) = X + 20 - Mathematics

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प्रश्न

Solve: 21 – 3 (x – 7) = x + 20

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उत्तर

21 – 3 (x – 7) = x + 20

⇒ 21 - 3x + 21 = x + 20

⇒ 42 - 3x = x + 20

⇒ 42 - 20 = x + 3x

⇒ 4x = 22

⇒ x = `22/4 = 11/2 = 5 1/2`

∴ x = `5 1/2`

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पाठ 12: Simple Linear Equations (Including Word Problems) - Exercise 12 (C)

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सेलिना Concise Mathematics [English] Class 7 ICSE
पाठ 12 Simple Linear Equations (Including Word Problems)
Exercise 12 (C) | Q 25
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