Question

Which ordered pair is the solution to the system of equations?

http://static.k12.com/bank_packages/files/media/mathml_07c39cc7a5266ae110e5bdbfa4a26061e35b5757_1.gif

A.
(8, 1)

B.
(−12, 2)

C.
(−4, −8)

D.
(4, −2)

Answer 1

plz help

Answer 2

if you multiply the second with -1;
and sum the 2 equations;
you will get
-4x= -16
x= 4; and after substitute in one of the equation you will get y = -2

Answer 3

plz explain the work

Answer 4

you see that the second one and first one have 4y

Answer 5

yea

Answer 6

to remove y's from the equation I just multiply with -1 and sum the two equations

Answer 7

multiply the second with -1

Answer 8

ok

Answer 9

sum the 2 equations you will get -4x = -16

Answer 10

the answer to the equation is 4. correct?

Answer 11

4x

Answer 12

so the answer is D?

Answer 13

thx

Answer 14

yea