gizzy1274 gizzy1274
  • 25-10-2017
  • Mathematics
contestada

How do I solve this using elimination?

80x + 45y = 645
x + y = 12

Respuesta :

crisforp
crisforp crisforp
  • 25-10-2017
x + y = 12  / x (-45);
Then, -45x - 45y = -540;
We have 80x + 45y = 645 and
               -45x - 45y = -540
            ________________
                35x           = 105;
Finally, x = 105÷35;
x = 3;
y = 12 - 3;
y = 9;
Answer Link
libbysworld123l
libbysworld123l libbysworld123l
  • 25-10-2017
If you combine like terms and do them differently you will have 3 different answers
Answer Link

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