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Solve: ("Y" + 2)/3 + ("Y" + 5)/4 = 6 - Mathematics

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Question

Solve: `("y" + 2)/3 + ("y" + 5)/4 = 6`

Sum

Solution

`("y" + 2)/3 + ("y" + 5)/4 = 6`


⇒ `(4"y" + 8 + "3y" + 15)/12 = 6`

⇒ 4y + 8 + 3y + 15 = 6 × 12

⇒ 7y + 23 = 72

⇒ 7y = 72 - 23 = 49

⇒ y = `49/7 = 7`

∴ y = 7

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Simple Linear Equations in One Variable
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Chapter 12: Simple Linear Equations (Including Word Problems) - Exercise 12 (C)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 12 Simple Linear Equations (Including Word Problems)
Exercise 12 (C) | Q 18
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