Question

find the solution of this system of equations ,
-6x + 3y=-39
-6x - 3y =-21

Answer 1

Add the two equations together what do you end up with?

Answer 2

i'm trying to do it. but i always end up mesing up on the the negative or postives, im doing a test online, and no matter what i try i keep getting them all wrong

Answer 3

-6x + -6x = what?

Answer 4

hi!

Answer 5

i know that part, they cancel out.

Answer 6

if you really want to do a test on line, then go ahead and cheat for real
check this out
http://www.wolframalpha.com/input/?i=-6x+%2B+3y%3D-39%2C+-6x+-+3y+%3D-21

Answer 7

-6x + -6x do not cancel out

Answer 8

im oing online schooling. they do cancel out because theyre the same. im trying to get an ordered pair, so x's cancel out, and i solve for Y, then plug in Y to solve for the X, i know how to do it. i just keep geting the signs wrong

Answer 9

Negative plus a negative = a negative ALWAYS
Positive plus a positive = a positive ALWAYS

So -6x PLUS -6x = -12x

Answer 10

Now +3y PLUS -3y equals what?

Answer 11

thanks misty lol