Which systems can be solved using the elimination by adding? Select all that apply. System A System B System C System D: - 4x - 2y = = -12 -- 4x + y = 0 7x - 2y = 24 -25 4x + 8y = -24 X-31 = -6 8r - 27 = 30 4x - 97 = 23 - 2x – 9y =

I won't answer them all for you (don't want to cheat - need to learn something).

But for the first one given:

-2x-9y=-25

-4x-9y=-23

you set up either x or y (which ever one you want to eliminate) so that one of them cancels.

So this one is easy - you just have to multiply an entire row by negative (doesn't matter which one) - so that the y's will be + and -

Since they're both 9 and they're subracting NOW - you can eliminate the y value. Now add/subtract the x's. So it'd be -2 or 2 depending on how you eliminated y. Then add the number outside of the = sign. Now just solve for x. After that plug in whatever you got for x into both of the rows. Then find the y value.

Hopefully this wasn't confusing -- reply if it is and I will try to simplify. I can give you contact if you need help with the rest

Step-by-step explanation: