What is the solution of the system?
7x + 5y = 19
–7x – 2y = –16
A. (2, 1)
B. (1, 2)
C. (7, 5)
D. (–7, –2)

Question

What is the solution of the system? 
7x + 5y = 19    
–7x – 2y = –16  
A. (2, 1)
B. (1, 2)
C. (7, 5)
D. (–7, –2)

anonymous · Answer

You want to use elimination to solve this. You can add these two equations together, and you combine the terms to get $$(7x-7x) + (5y-2y) = 19-16$$ => $$3y = 3$$ => $$y=1$$
So the answer is A, but in the future you just take the answer you get from elimination and plug it in to one of the equations to get the other variable. In this case you would get $$x=2$$ Good luck!

anonymous · Answer

Thank you so much! that helped alot. i made a 100 :)

anonymous · Answer

No problem! That's awesome :D