Question

solvethe following sytem of equations... show solution method 3x+2y=5,-2x+y=-1

Answer 1

What to do, what to do...

We can eliminate a variable; lets pick 'y' just cause..

3x +2y = 5
(-2)(-2x + y = -1)

3x +2y = 5
+ 4x -2y = 2
------------
7x + 0y = 7

x = 1 if I did it right :)

now pick an equation and substitute x=1 and solve for y:

3(1) +2y = 5
2y = 2

y=1 that was nifty; but lets see if these values for x and y work with the other equation as well, otherwise it wont be a solutions.

,-2(1)+(1)=-1
-2 +1 = -1 i think its true :)