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Linear Algebra

rewrite the following as simultaneous equations

x=(a-c-by)/2b
y=(a-c-f-bx)/2b

solve for x and y then show that x+y=(2a-2c-f)/3b

i think i've rewritten it correctly but and not sure how to proceed from there.

help appreciated

edit

i can solve it by just doing standard algebra, but it's the use of linear algebra that i can't do
(edited 10 years ago)
Original post by TPJY
rewrite the following as simultaneous equations

x=(a-c-by)/2b
y=(a-c-f-bx)/2b


Well they're simultaneous equations as they stand.

However, if you're doing linear algrbra, matrices, etc. then possibly they want them in the form

ax+by=c (Note: those are not the a,b,c of your original equations - I'm just showing the general form.

Which can then be written in matrix form, reduced, and solved for x, y.
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TPJY
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10
Original post by ghostwalker
Well they're simultaneous equations as they stand.

However, if you're doing linear algrbra, matrices, etc. then possibly
they want them in the form

ax+by=c (Note: those are not the a,b,c of your original equations - I'm just showing the general form.

Which can then be written in matrix form, reduced, and solved for x, y.

ah okay thanks :smile:

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