Respuesta :

boatengalbert291
With x=10
This implies that 3(10)+5y=20

30+5y=20

5y=20-30

5y=-10

Divide through by 5

y=-2

Therefore (x,y) =(10,-2)

Solution:

Note that:

  • x = 10
  • 3x + 5y = 20

Use system of equations to solve for x and y.

  • x + 0y = 10

       3x + 5y = 20

  • 3x + 0y = 30

       3x + 5y = 20

  • 0y - 5y = 30 - 20
  • => -5y = 10
  • => y = -2

Substitute the value of y into any equation to find x.

  • 3x + 5y = 20
  • => 3x + 5(-2) = 20
  • => 3x - 10 = 20
  • => 3x = 30
  • => x = 10

Put the solution in (x,y) form.

  • (x,y) = (10,-2)

Hoped this helped!

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