use the elimination method to solve the systedm of equations.
3u+2v=-15
2u+v=-7

Question

use the elimination method to solve the systedm  of equations.
3u+2v=-15
2u+v=-7

anonymous · Answer

pl help me im lost

anonymous · Answer

The elimination method involves subtracting an entire equation from another to remove a variable
In order to do this the coefficient of one variable must be the opposite of another, so subtract the second equation by 2
$$2(2u+v=7)$$$$4u+2v = +14$$Subtract this from your first equation
$$3u+2v = +15$$$$-(4u+2v = +14)$$or (-u = 1). Plug this back into either equation and solve for v.

anonymous · Answer

One variable must be EQUAL* to another, not its opposite.
And you MULTIPLY an equation by 2, not subtract. 
If you're still confused let me know

anonymous · Answer

im

anonymous · Answer

im lost

anonymous · Answer

elimination example

|dw:1376627656658:dw|