tarah55
tarah55 tarah55
  • 14-05-2020
  • Mathematics
contestada

Find the solution of this system of equations
-9x - 2y = -55
6x - 4y = -26
Stere corect over

Respuesta :

thuytrannguyen2305
thuytrannguyen2305 thuytrannguyen2305
  • 14-05-2020

Answer:

x = 3.5

y = 11.75

Step-by-step explanation:

-9x - 2y = -55

6x - 4y = -26

Step 1:

-2(-9x - 2y = -55) → 18x + 4y = 110

Step 2:

18x + 4y = 110

 6x - 4y = -26

      24x = 84

       24    24

         x = 3.5

Step 3:

6(3.5) - 4y = -26

     21 - 4y = -26

    -21           -21  

         -4y = -47

          -4      -4

             y = 11.75

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