Question

Elimination Method
a+8b=16
2+2b=-2
got (4,-3)
Can someone tell me if that is correct?

Answer 1

is the 2nd equation equation really 2+2b = -2?

Answer 2

That was a mistake it is
a+2b=-2

Answer 3

No, (4,-3) is not the correct answer

Answer 4

can you explain it to me step by step. I am not getting the correct answer

Answer 5

Notice we have 'a' in the first and second equations. So we can multiply both sides of the second equation with -1 and add to get rid of these terms


a+2b=-2

-1(a+2b)=-1(-2)

-a-2b = 2

So we now have


a+8b=16
-a-2b = 2


Now add the two equations

a+8b=16
-a-2b = 2
----------
0a+6b = 18


So 6b = 18

Answer 6

Solve for b. Then use this to find 'a'

Answer 7

so i got b=3 a=-8
Correct?

Answer 8

yes you got it

Answer 9

In this equation will this be the correct form (3,-8)?

Answer 10

no, put it in alphabetical order

Answer 11

so 'a' comes first, then b

Answer 12

that's why they call it an *ordered* pair

Answer 13

Thank you

Answer 14

yw