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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 7

How much smaller is 2ab + 4b – c than 5ab – 3b + 2c - Mathematics

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Question

How much smaller is 2ab + 4b – c than 5ab – 3b + 2c

Sum

Solution

To find the answer we have to find the difference.

Here greater number 5ab – 3ab + 2c.

∴ Difference = 5ab – 3b + 2c – (2ab + 4b – c)

= 5ab – 3b + 2c + (– 2ab – 4b + c)

= 5ab – 3b + 2c – 2ab – 4b + c

= (5 – 2)ab + (– 3 – 4)b + (2 + 1)c

= 3ab + (– 7)b + 3c

= 3ab – 7b + 3c

It is 3ab – 7b + 3c smaller.

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Chapter 3: Algebra - Exercise 3.4 [Page 69]

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Samacheer Kalvi Mathematics - Term 1 [English] Class 7 TN Board
Chapter 3 Algebra
Exercise 3.4 | Q 4 | Page 69
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