Question

4a +2b = 0
-4a + b = 24
I know that b = 8, but I need help solving for a.
4a + 2(8) = 0, how would I solve this?

Answer 1

4a = -16
Can you solve it now?

Answer 2

@Chlorophyll Just a moment, I will try. I believe I can.

Answer 3

@Chlorophyll a= -4

Answer 4

Yes, 4a = -16
-> a = -16/4 = -4

Answer 5

May I ask how you got -16? @Chlorophyll I would have just got 16 by multiplying 2 x 8 but why is it negative?

Answer 6

4a + 16 = 0
Since you need to switch 16 to the right side,
-> the sign needs to be changed from +16 to - 16

Answer 7

Oh okay, I see. Thank you!

Answer 8

Anything else feel free to ask :)

Answer 9

@Chlorophyll Will do!

Answer 10

I forgot to ask if you're confident to find b?

Answer 11

@Chlorophyll on the previous question? yes, I already found be, i was just not sure about how to find a.

Answer 12

Why don't you open the new post for each problem. It's much easier to follow up!