Question

The value of x - y, when the two equations are x + y = 50 and 3x - 2y = 0 is
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Answer 1

Answer:

x+y = 50 equation ( 1)

3x - 2y = 0 equation (2)

equation (1) × 2

then 2x + 2y = 100 equation (3)

equation (2) + equation (3)

then you find 5x = 100

x= 100/ 5

x= 20

x ka value equation (1) me rakhne par

20 +y =50

y= 50 -20

y = 30

x and y ka value equation (1) me rakhane par

x-y

= 20 -30

=-10 answer

please given me brainlist answer !!

Answer 2

x - y = -10

working:

   x + y = 50

3x - 2y = 0

(bring x on one side which is also called "substitution")

          x = 50 - y   (first equation)

        3x = 2y

          x = 2y/3    (second equation)

  50 - y = 2y/3    (cross x)

150 - 3y = 2y

-3y - 2y = -150

      -5y = -150 (cancel minus)

         y = 30

 x + y = 50

x + 30 = 50

       x = 50 - 30

       x = 20

     x - y =

20 - 30 = -10