Question

If x + 10y = 20 and
10 y - 15x = 20
Then find the value of x and y​

Answer 1

Answer:

given equation are x + 10y = 20.....,(i)

and 10y - 15x = 20 .....,(ii)

subtracting ,(I) from ( ii)

'10y - 15x - x - 10y =. 20-20

-16x. = 0

x = 0

putting x = 0 in (I)

x + 10y = 20

0 + 10y = 20

10y = 20

y = 2

Answer 2

Answer:

x = 0

y = 2

Step-by-step explanation:

Given

x + 10y = 20 -----------(i)

10 y - 15x = 20---------(ii)

In equation (i)

$= > x + 10y = 20 \\ = > \boxed{x = 20 - 10y}$

Now, put the value of x in equation (ii)

$= > 10y - 15x = 20 \\ = > 10y - 15(20 - 10y) = 20 \\ = > 10y - 300 + 150y = 20 \\ = > 160y = 20 + 300 \\ = > 160y = 320 \\ = > x = \frac{ \cancel320}{ \cancel160} \\ = > \boxed{y = 2}$

Now, put the value of y in equation (i)

$= > x + 10y = 20 \\ = > x + 10 \times 2 = 20 \\ = > x = 20 - 20 \\ = > \boxed{x = 0}$