solve the system using any method:
6x-10y=12
-15x+25y=-30

Question

solve the system using any method:
6x-10y=12
-15x+25y=-30

jdoe0001 · Answer

so, pick a method and use that :)

anonymous · Answer

how about the observe method?

jdoe0001 · Answer

hehe

anonymous · Answer

i like elimination... especially in this problem

jdoe0001 · Answer

yes, elimination would be simpler

anonymous · Answer

eliminate x

anonymous · Answer

just a suggestion...

wolf1728 · Answer

A)  6x-10y=12 
B)  -15x+25y=-30
What about multiplying equation A by 2.5?

anonymous · Answer

yuck...
mult 1st by 5 and 2nd by 2

anonymous · Answer

ok thank you both!

wolf1728 · Answer

pgpilot326 - Isn't it better and easier just to multiply one equation?

wolf1728 · Answer

Multiplying equation A makes it become
A) 15x-25y=30 Then add this to equation B 
B) -15x+25y=-30

anonymous · Answer

just depends... in the end, the answer is the same.

wolf1728 · Answer

Wow - it looks as though the 2 equations are identical - then no solution?

anonymous · Answer

not exactly... if they're the same then there are an infinite number of solutions

wolf1728 · Answer

okay - yes - I consider it no solution - it's a lot less to write on a test or homework assignment. :-)

anonymous · Answer

but it's wrong to say no solution!

wolf1728 · Answer

yes - you are right
of course I would not want a professor or teacher to ask for ALL solutions - writer's cramp would ensue.

anonymous · Answer

you simply say all solutions are of the form (x, 3/5 x - 6/5) where x is any reall number.

wolf1728 · Answer

okay - a mathematically elegant answer.