Question

Use elimination to solve the equations:
10y + 11x = -31
-8x = 11y - 11

Answer 1

I abhor elimination, substitution is best!

Answer 2

Anyway, elimination is basically when you eliminate terms to get your answer

Answer 3

Thatʻs the 1st part, then the 2nd part is basically substitution

Answer 4

I dislike substitution as well but we have to learn it.

Answer 5

I had the equations:
\(10y + 11x = -31\)
\(-11y - 8x = -11\)

I multiplied
\((10y + 11x = -31)8\)
\((-11y - 8x = -11)11\)

Answer 6

I then got
\(8y + 88x = -248\)
\(-121y - 88x = -121\)

Answer 7

Sorry I meant
\(80y + 88x = -248\)

Answer 8

was going to say, haha

Answer 9

Ok, where did you go from ther

Answer 10

there*

Answer 11

I then had
\(-41y = -369\)
\(y = 9\)

Answer 12

I then plugged in 9 into where \(y\) is in the equation and solved for \(x\) \(-11y - 8x = -11\) to get \(x = -11\)

Answer 13

y = 9 correct

Answer 14

What about \(x\)?

Answer 15

That is correct a swell

Answer 16

As well

Answer 17

Good job

Answer 18

Thank you!

Answer 19

Looks like you have a good handle on the concept, all I had to do was check your work haha

Answer 20

I was kind of confused when the lesson was taught. So I came here to make sure whether I what was doing was correct or not.

Answer 21

*I what -> what I

Answer 22

Seems like you got it!