How do I use the addition method to solve the system:
ax+by=e and
cx+dy=f
For this problem I know that D=0, Dx=0 , and Dy=0 The objective is to end up with an identity. Proving that it has infinitely many solutions.

Question

How do I use the addition method to solve the system:
ax+by=e and
cx+dy=f  
For this problem I know that D=0, Dx=0 , and Dy=0 The objective is to end up with an identity. Proving that it has infinitely many solutions.

kaiiskool · Answer

so d is obviously zero, im guessing you would have to come up with an equation on your  own to make it identical, Hope this helps good luck

anonymous · Answer

@Kaiiskool Can you give me an example of how to make my own identical equation. Sorry for all the questions. I'm really confused. :(

kaiiskool · Answer

To be honest i am to

kaiiskool · Answer

i hated this in school, they said you just have to make it identical ?

kaiiskool · Answer

anything multiplied by one is the identical property

anonymous · Answer

@Kaiiskool No it doesn't say make it identical. It says: "Prove that the system has infinitely many solutions. Assume that D=0, Dx=0, Dy=0 and solve system of equations using the addition method.(Hint: it should end up with an identity, aka a true statement for x &y)."

 I don't understand how to use the addition method when the equation is just letters. 

If I insert the given solutions [x=0, y=0] then it's 0+0=0. Does that prove infinitely many solutions?

kaiiskool · Answer

OH, thats still a toughy im almost tapped out, im doing the math right now and i cant seem to come up with a complete answer than that x and y can be any any numbers becose this isnt a finished equation
(if that makes any sense to you)