millie41982 millie41982
  • 11-02-2021
  • Mathematics
contestada

Solve the simultaneous equations
5x + 2y = -2
3x - 5y = 11.2

Respuesta :

Thorpe33 Thorpe33
  • 11-02-2021

Answer:

X= 2/5 y=-2

Step-by-step explanation:

5x + 2y = -2

3x - 5y = 11.2

Using the elimination method

Multiply equation 1 by 3

Multiply equation 2 by 5

15x + 6y = -6

15x - 25y = 56

Subtrat  3 from 4

-31y= 62

Divide both sides by -31

y= -2

To arrive at x, substitute y= -2 in equation 1

5x + 2y = -2

5x + 2(-2)= -2

5x -4 = -2

Collect like terms

5x= -2+4

5x= 2

Divide both sides by 5

x= 2/5

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