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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

Find x and p: 13-x3=7x12+54 - Mathematics

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Question

Find x and p: `1/3 - x/3 = (7x)/12 + 5/4`

Sum

Solution

Transposing `(-x)/3` to the other side, it becomes + `x/3`

∴ `1/3 = (7x)/12 + 5/4 + x/3`

Transposing `5/4` to the other side, it becomes `(-5)/4`

`1/3 - 5/4 = (7x)/12 + x/3`

Multiply by 12 throughout we look at the denominators 3, 4, 12, 3 and take the L.C.M, which is 12

`1/3 xx 12 - 5/4 xx 12 = (7x)/12 xx 12 + x/3 xx 12`

4 – 15 = 7x + x × 4

– 11 = 7x + 4x

11x = – 11

x = – 1

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Chapter 3: Algebra - Exercise 3.6 [Page 102]

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Samacheer Kalvi Mathematics [English] Class 8 TN Board
Chapter 3 Algebra
Exercise 3.6 | Q 4. (iii) | Page 102
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