solve by the elimination method

Question

anonymous · Answer

6x-2y=11
-9x+3y=16

anonymous · Answer

@Hero  @SolomonZelman

tkhunny · Answer

What's preventing you from succeeding on this one?  Have you considered a common multiple of two corresponding coefficients?

I'm tempted to multiply the first equation by 3 and the second by 2.  Why not do that and see if anything pops out.

anonymous · Answer

when i tried, both of the variables cancelled out...

tkhunny · Answer

Why didn't you say that?  Please show your work up front.  It simplifies everything.

Okay, let's see...

18x-6y=33
-18x+6y=32

Adding

0 = 65

Okay, what does that mean?  Is 0 the same as 65?

anonymous · Answer

i guess, but that's not possible XD

anonymous · Answer

@SolomonZelman

tkhunny · Answer

No, it's quite possible.  Since 0 = 65 is nonsensical, it means there no solution.  Done!!  There is no pair of values, x and y, that solve both equation simultaneously.

anonymous · Answer

ok, could you help me with another? this one has 3 variables...

tkhunny · Answer

Post new problems on new threads, please.

anonymous · Answer

alright