Question

solve the system using elimination.
5x + 8y = –29
7x – 2y = –67


(–7, 9)
(-10, 21/8)
(–9, 2)
(–1, –3)

Answer 1

@jim_thompson5910

Answer 2

we can eliminate y

Answer 3

multiply everything in the second equation by 4

Answer 4

7*4=28 2*4=8 right?

Answer 5

it's actually -2*4 = -8

Answer 6

do i multiply -67 too?

Answer 7

oops yeah

Answer 8

What do i do next?

Answer 9

yes you multiply -67 * 4

Answer 10

-268

Answer 11

so
\(\bf{5x+8y=-29\\28x-8y=-268}\)

Answer 12

now add 5x +28x = 33x
8y + (-8y) = 0
-29 + (-268) = -279

Answer 13

ok

Answer 14

what do I do next?

Answer 15

-29 + (-268) = -297

Answer 16

so
33x = 297
solve for x

Answer 17

33*9=297 so x=9

Answer 18

yes

Answer 19

wait -297

Answer 20

so x = -9

Answer 21

oh ok

Answer 22

so (-9,2)

Answer 23

so its (-9, 2)

Answer 24

yup

Answer 25

thanku!!

Answer 26

yw :]

Answer 27

Would u know how to do this?

What is the solution of the system of equations?
y = –4x + 10
y = –2x – 6

(–2.67, 20.67)
(–22, 8)
(–2, –2)
(8, –22)