Question

solve 4/x + 5y= 7 and 3/x + 4y= 5​

Answer 1

4/x+5/y=7 .....(1)

3/x+4y=5 ......(2)

4×2–3×(3)

12x+16y–12x–15y=20–21

y=–1

substitute y=–1 in (1) we get

4x+5×–1 =7

4x = 7+5=12

or x = 12/4=3

x=3 y=–1

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