Question

4/x+5/y=8, 3/x+5/y=7 then x=?​

Answer 1

Step-by-step explanation:

$\huge \bf \fbox \orange{answer}$

3x+5y=9-----(1)

5x+3y=7-----(2)

multiplying eq(1) by 5 & eq(2) by 3 we get

15x+25y=45

-15x ± 9y= - 21

_____________

16y=24

$y = \frac{24}{16} = \frac{3}{2}$

$(y = \frac{3}{2} )and \: x = 9 - 5x {3}^{2}$

$= - \frac{1}{2}$

$hence(x = \frac{1}{2} ) \: and \: (y = \frac{3}{2} )$

$so \: x + y = \frac{1}{2} + \frac{3}{2} = 2$