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Addition and Subtraction of Algebraic Expressions

Find the valu...

Question

Find the value of the following expression:
5a - 7b - 1, if a = 4 and b = 1.

A

10

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B

11

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C

12

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D

13

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Solution

The correct option is C 12
(5 $\times$ 4) - (7 $\times$ 1) - 1
= 20 - 7 - 1
= 12

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