dayana87
dayana87 dayana87
  • 24-11-2020
  • Mathematics
contestada

X=y-4 7x-2y=17 solve the system

Respuesta :

nzwoodbridge nzwoodbridge
  • 24-11-2020

Answer:

Y=9  X=5

Step-by-step explanation:

You can use substitution to solve this problem.

As you see:

X = Y-4

7X-2Y=17

Plug in X to the second equation.      

7(Y-4)-2Y=17

Distribute.

7Y-28-2Y=17

Move the 28 with the 17.

7Y-2Y=45

Subtract the Y values.

5Y=45

Y=9

Now find X. Plug in Y to the first equation.

X= 9-4

X= 5

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