Question 83 (a)

A wire is (7x -3) metres long. A length of (3x -4) metres is cut for use. Now, answer the following question:

How much wire is left?

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Solution

Given, length of wire = (7x - 3) m
and wire cut for use has length = (3x - 4) m
Length of wire left = (7x - 3) - (3x - 4) = 7x - 3 - 3x + 4 = 7x - 3x - 3 + 4
= (4x + 1) m

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Question 83 (b)

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Question 83 (a) A wire is (7x -3) metres long. A length of (3x -4) metres is cut for use. Now, answer the following question: How much wire is left?

Given, length of wire = (7x - 3) m and wire cut for use has length = (3x - 4) m Length of wire left = (7x - 3) - (3x - 4) = 7x - 3 - 3x + 4 = 7x - 3x - 3 + 4 = (4x + 1) m

Question 83 (a)

A wire is (7x -3) metres long. A length of (3x -4) metres is cut for use. Now, answer the following question:

How much wire is left?

Given, length of wire = (7x - 3) m
and wire cut for use has length = (3x - 4) m
Length of wire left = (7x - 3) - (3x - 4) = 7x - 3 - 3x + 4 = 7x - 3x - 3 + 4
= (4x + 1) m