Need Help!!!!!!!!!!!!!!!!! Select the ordered pair from the choices below that satisfies the following system of equations:
3x − 4y = 18
5y = x − 28

Question

Need Help!!!!!!!!!!!!!!!!! Select the ordered pair from the choices below that satisfies the following system of equations: 
3x − 4y = 18 
5y = x − 28

anonymous · Answer

i jus need to knoe if its one of these  (4, -3/2)
       (5, -3/4)
       (-2, -6)
       (-6, -9)

anonymous · Answer

(4, -3/2)

anonymous · Answer

it's the third ordered pair

hero · Answer

Have you tried actually solving the system @CrisYB ?

anonymous · Answer

Solve the system of equations. Which method do you know so far?

hero · Answer

For starters, you can rewrite the system as such

3x - 4y = 18
  x - 5y = 28

anonymous · Answer

^ not if you are using the substitution method and you are solving for y on the second equation

hero · Answer

You mean you can solve for x in the second equation

hero · Answer

But you can also use elimination method

anonymous · Answer

but @hero's method works perfectly. i solved for y and got the answer

anonymous · Answer

Whatever you just can't assume that your method is the best way to solving the problem @Hero

anonymous · Answer

and he's suggesting a method, not assuming. remember don't assume @RyanL.

hero · Answer

I didn't assume anything @RyanL.

anonymous · Answer

Then why did you bother doing the elimination method then?

anonymous · Answer

why did you bother to do so much work by moving variables around so the equation could equal x. I just don't get it

hero · Answer

I like having one consistent method, so I usually end up isolating y in both equations, then setting y = y and solving for x.