jarrod410
jarrod410 jarrod410
  • 14-09-2016
  • Mathematics
contestada

Solve the system of equations 2x + 3y = 40 and –2x + 2y = 20.



Respuesta :

iMercy iMercy
  • 14-09-2016
2x + 3y = 40
+
-2x + 2y = 20
___________                  Adding both equations

0x + 5y  = 60
____________


5y = 60
y = 60/5 = 12

y = 12.

Since we have gotten y =12, and the only option with that is option D.

So we don't have to solve for x.

The answer is D.
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