can someone teach me how to figure out when one equation system doesn't have a solution.

Question

saifoo.khan · Answer

please elaborate the question!

anonymous · Answer

in other words, which of the following equation systems cannot be solved

anonymous · Answer

when the slope of the equations are the same but the y-intercepts are different

saifoo.khan · Answer

with same slopes.. and different y intercpts.

anonymous · Answer

dont get it. With the equations above. Can you teach me

saifoo.khan · Answer

sure i can.

saifoo.khan · Answer

in the picture all can be solved.

anonymous · Answer

the last one can't be solved.

saifoo.khan · Answer

Lol, yea. i didnt saw that.

saifoo.khan · Answer

sorry!

anonymous · Answer

Its ok dude

Acoording to what I understand. I should put the equations into the form y=mx+b and compare slopes and y intencepts, right?

saifoo.khan · Answer

look:

x + 3y = 6
3x+9y = 7

if u look @ the second equation, thats the triple of the first.

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Oh Yea u got the point right!

anonymous · Answer

let me try; if I get stacked, Ill ask you for help. Thanks

saifoo.khan · Answer

Sure! :]

anonymous · Answer

I got it, thank you all :)

saifoo.khan · Answer

Uw. :]