Posted by **Donna ** on Tuesday, February 15, 2011 at 5:23pm.

I need to know if I am doing this problem right when sustitution method.

y+2x=3

y+2x=-4

y+2x=3 -1(y+2x=3)-y-2x=-4

now add the two equation

y-2x=3

-y-2x-4

the answer would be -4y=7

then divided -4=7 answer 1.75

I no that there is more to this answer I am just stuck and not sure if this is right are not.

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