Question

find the value of x+y if 5x+4y=22 and 4x+5y=17

Answer 1

Answer:

–5

Step-by-step explanation:

5x + 4y = 22. …(1)

4x + 5y = 17. …(2)

Multiplying (1) & (2) by 5 , we get:

25x + 20y = 110

20x + 25y = 85

–. –. –

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5x - 5y = 25

x-y = 25/5 = 5

x + y = –5

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