Solved! =D Thankyou! =D
I need some help solving an equation. =]
We have to find out what x and y stand for.
For the last 10 sums, all I had to do was draw a giant sum, and cancel whatever is canceled out and work it out from there. But I can't do it for this one:
4x + 2y = 20
3x + 2y = 16
So what do I do?
(Also, the teacher said that some of the answers say "No solution". Do you think this a "No solution" answer?)
Mr F edit in red.
Originally Posted by Hikaru
Subtract equation (2) from equation (1): (4x + 2y) - (3x + 2y) = 20 - 16 => x = 4.
Sub x = 4 into equation (1): 4(4) + 2y = 20 => 16 + 2y = 20 => 2y = 4 => y = 2.
Ohhhhh coolio. =] Thanks!
Originally Posted by mr fantastic