Question

solve by elimination
6x+2y=-28
6x-2y=-44

Answer 1

tina... if you add straight down.. what do you get.

Answer 2

12x 4y -72

Answer 3

almost. 12x then the y's cancel because 2y - 2y = 0

12x = -72

Answer 4

ok wasnt sure how that worked

Answer 5

Now, how do you solve for x?

Answer 6

12(-6)=-72

Answer 7

x=-6

Answer 8

but then how do i solve for y, the problem is asking for the solution

Answer 9

good.. so now you have to put that back into one of the equations to find y
I will use the first one.

Answer 10

6x + 2y = -28
6(-6) + 2y = -28
-36 + 2y = -28
2y = 8
y = 4

Answer (-6,4)

Answer 11

so do u add -36 or subtract it from both sides

Answer 12

you add 36 because you are getting rid of -36

Answer 13

the sign before a number ALWAYS goes with the number and you do the opposite.

Answer 14

-28--36
=8
or -28+-36 makes -64

Answer 15

-28 + 36 = 8 (-- is +)

Answer 16

ok thats what i thought so then 2y=8
2(4)=8
y=4

Answer 17

quick lesson

x + 5 = 10 you - 5 because it says + 5

x - 4 = 10 you + 4 because it says - 4

7 + x = 10 you - 7 because you have + 7

-6 + x = 10 you + 6 because you have -6

Answer 18

2y = 8 because it says 2 times y you divide by 2

2y 8
-- = --
2 2

the 2's cancel to leave you with

y = 4

Answer 19

(-6,4) is the solution

Answer 20

right

Answer 21

Yes

Answer 22

ok thank you so much