How do I solve this using elimination?

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

Question

25-10-2017
Mathematics

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How do I solve this using elimination?

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

Respuesta :

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crisforp crisforp · Answer 1 · 2017-10-25T07:52:19+02:00

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;

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libbysworld123l libbysworld123l · Answer 2 · 2017-10-25T08:12:13+02:00

libbysworld123l libbysworld123l

25-10-2017

If you combine like terms and do them differently you will have 3 different answers

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How do I solve this using elimination? 80x + 45y = 645 x + y = 12

Respuesta :

Otras preguntas

How do I solve this using elimination?

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