Question

What is the solution?

4a+8b=-16
-4a+b=34

Answer 1

a is -8 and b is 2 i believe

Answer 2

You need to solve for one variable and then plug it into the opposite equation.

Let's start with the 2nd one:
-4a+b=34
b=(34+4a)

Now you can plug "b" into the opposite equation to solve for just "a."

4a+8(34+4a)=-16

Solve here for "a" and then plug the "a" value you get back into -4a+b=34 to solve for "b."

Answer 3

.-. thats to much to do

Answer 4

my way easier plug in the answer i gave it is correct

Answer 5

.-. to lazy to explain process

Answer 6

8x34=272
8x4a=32a

So...
4a+272+32a=-16
36a+272=-16
36a=-288
a=-8

Plug a = -8 back into -4a+b=34
-4(-8)+b=34
32+b=34
b=2

Answer 7

to much xD

Answer 8

When the equations are simple it's easy to guess, but as they get more complex it's good to know the process lol.

Answer 9

i do something easier

Answer 10

4a+8b=-16
-4a+b=34

i add them
so 4a + -4a cancel 8b+b is 9b ans -16 + 34 is 18
so what is left is 9b=18 so 2=b then you plug it in to get a lol so much easier then what you did

Answer 11

Agreed, much faster haha

Answer 12

i'm lazy XD i like short and easy ways