Question

X/2 + y = 0.8 and 7/(x +y/2) =10

Answer 1

Answer:

Step-by-step explanation:

Answer 2

$\Large{\textbf{\underline{\underline{According\;to\;the\;Question}}}}$

x/2 + y = 0.8

7/(x + y/2) = 10

Above equations can be written as :-

x + 2y = 1.6 ………....(a)

14/(2x + y) = 10

10(2x + y) = 14

20x + 10y = 14

2(10x + 5y) = 14

10x + 5y = 14/2

10x + 5y = 7 ……...............(b)

Now,

Multiply (a) by 10 we get :-

10x + 20y = 16 …............. (c)

Now,

Subtracting (c) from (b) we get :-

-15y = - 9

15y = 9

y = 9/15

y = 3/5

Now,

Putting this value of y in (a) :-

x + 2y = 1.6

x + 2(3/5) = 1.6

x + 6/5 = 1.6

x = 1.6 - 6/5

x = 1.6 - 1.2

x = 0.4

x = 4/10

x = 2/5

Therefore,

x = 2/5 and y = 3/5