solve by substitution.

a) x-2y=4
x-3y=6

i got the solution as (8,16) but i checked the answer at the back of the book and that's not it.

Question

solve by substitution. 

a) x-2y=4
    x-3y=6

i got the solution as (8,16) but i checked the answer at the back of the book and that's not it.

anonymous · Answer

btw it says the answer is (0,-2)

goformit100 · Answer

Recheck your procedure of solving it.

anonymous · Answer

what is a .jpglarge filetype?

anonymous · Answer

https://twitter.com/Osgiliaths/status/332694843333693441/photo/1 ok can you see this?

anonymous · Answer

perfect, thank you

anonymous · Answer

Have you tried making 2 into an equation so that X is by itself is on one side then the rest of the equation on the other side?

texaschic101 · Answer

x - 2y = 4---> x = 2y + 4
now sub that in to the other equation
x - 3y = 6
2y + 4 - 3y = 6
-y = 6 - 4
-y = 2
y = - 2
now sub -2 in for y in either of the original equations
x - 2y = 4
x - 2(-2) = 4
x + 4 = 4
x = 4 - 4
x = 0
ANSWER (0,-2)

anonymous · Answer

Instead of giving an answer, you could point in the right direction, but yes that is the correct way to solve the question. I just hope you actually understood how it's done rather than copy it like a parrot....

texaschic101 · Answer

@skittikinz ...if you have any questions, please ask them.I will be glad to explain anything I did.

texaschic101 · Answer

Did you find your mistake ?

anonymous · Answer

OH yes i found it! thank you so much

texaschic101 · Answer

you could have also subbed in x = 3y + 6 in for x. Either way , you will get the same answer.

texaschic101 · Answer

Do you have any questions ?

anonymous · Answer

nope! thanks again