Solve x + y = 5 using matrices.
2x – y = 1

I have the answer, x = 2 and y =3, how do I phrase this as a matrices?

(2,3)?

Question

Solve x + y = 5 using matrices.
2x – y = 1

I have the answer, x = 2 and y =3, how do I phrase this as a matrices?

(2,3)?

rishavraj · Answer

u know Cramer's Rule??

sloppycanada · Answer

I don't think that was covered.

rishavraj · Answer

Cramer's Rule.
If the equations are 
$$a_1 x + b_1 y = c_1$$
$$a_2 x + b_2 y = c_2$$
then the solutions are are 
$$x = \frac{ D_1 }{ D }   ~~~~ and ~~~~~ y = \frac{ D_2 }{ D }$$

rishavraj · Answer

where 
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sloppycanada · Answer

Okay... so I'm phrasing mine wrong?

rishavraj · Answer

hmmm wht do u mean?? u tried it using matrices??

sloppycanada · Answer

I think so, I'm thinking it's [2 3]

rishavraj · Answer

u hav been askd to solve using matrices ...thts why u need to solve it tht way

sloppycanada · Answer

but I don't understand how I'm supposed to do that. Just plug in the equations to what you gave me?

rishavraj · Answer

yup....bt use with appropriate signs.....the answers will remain the same....kinda obvious :P

sloppycanada · Answer

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