Question

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Answer 1

Answer:

Taking 1/x = u, the given equation becomes

4u + 5y = 7………(i)

3u + 4y = 5………(ii)

Subtracting (ii) from (i), we get

4u + 5y – (3u + 4y) = 7 – 5 ⇒ u + y = 2 ⇒

u = 2 – y………(iii)

Using (iii) in (i), 4(2 – y) + 5y = 7

⇒ 8 – 4y + 5y = 7 ⇒ y = -1

Putting y = -1 in (iii), we find u u = 2 – (-1) ⇒ u = 3 ⇒ x = 1/u = 13/13

Hence, the solution for the given system of equations is x = 13/13 and y = -1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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