Solve the following system using elimination.

3x + 6y = 42

-7x + 8y = -109

Question

Solve the following system using elimination.

3x + 6y = 42

-7x + 8y = -109

anonymous · Answer

Why are there 2 x's for the first equations?

anonymous · Answer

sorry I meant 6y not 6x

anonymous · Answer

ok moment

anonymous · Answer

its 4,2 can i have a  medal

anonymous · Answer

Thanks, can you explain how you got there though?

anonymous · Answer

yes of corce what you do first is you put then together so you subtract the x's and the y's then you keep going

anonymous · Answer

do you get it

anonymous · Answer

I got (15,-1/2)

anonymous · Answer

you cant

anonymous · Answer

because the answer has to be in numbers

anonymous · Answer

I added them and after you add them you get -4x + 14y = 67, but with elimination you have to isolate a variable and then subsitute

anonymous · Answer

Plug in my answers 
X= 15
Y= -1/2

anonymous · Answer

but isolate a variable and make it so that it is equal to just a number not a number and another variable

anonymous · Answer

Okay

anonymous · Answer

oow i see my mistake thanks so you do that and keep going until you divivde when you divide you can stop and thats your answer

anonymous · Answer

Okay so you're right @Iramos1998 , but how did you get to that?

anonymous · Answer

My work is sloppy but I'm positive I got the correct answers and @mystery... Can have the medal :)

anonymous · Answer

I can redo the work neatly if you need me t

anonymous · Answer

No it's okay thank you so much! :)