Question

need help solve this equation using the elimination method 6x – 4y = 54
–9x + 2y = –69

Answer 1

Multiply the second equation by 2 nd can u plz tell me vat u get?

Answer 2

-18+4y=-138

Answer 3

yup good:) nw add this one with the first equation. terms with variable y will be elimnated. then solve for x. can u do it @yayasims21

Answer 4

i cannt can u do it

Answer 5

plz give it a try. if u face any difficulty when doing it plz ask. I will help u:)

Answer 6

ok so im suppose to add -18+4y=-138 to 6x-4y=54

Answer 7

ya:)

Answer 8

i cant do it my calculator wont let me

Answer 9

-18x+4y+6x-4y=-138+54
(-18x+6x)+(4y-4y)=-138+54
See if u can do it nw:)

Answer 10

Add the ones inside the parentheses

Answer 11

i cant do it i really suck at math

Answer 12

what is
-18x+6x?

Answer 13

-12

Answer 14

-12x.
what is
4y-4y?

Answer 15

0

Answer 16

yup right:)
what is -138+54

Answer 17

-84

Answer 18

yup good. nw combine these results.

Answer 19

add them

Answer 20

ya.

Answer 21

i get -96

Answer 22

@ajprincess happy new year & to @yayasims21 too :)

Answer 23

o thanks happy new year to u 2

Answer 24

:)

Answer 25

no. remember u can add -12x with -84. nd -84 is in the right side of the equal aign.
-18x+6x+4y-4y=-138+54
-12x+0=-84
-12x=-84
Divide by -12 both sides to find x.
Thanx @TheViper and I wish u the same:)

Answer 26

:)

Answer 27

-12 divided by -12 is 1 and -84 is 7

Answer 28

remember u r dividing -12x by -12 nt -12. this leaves u with x and u r right abt getting 7:)

Answer 29

So ur x becomes 7. To find y plug in this value in either 6x – 4y = 54 or
–9x + 2y = –69 and solve

Answer 30

ok wat do u mean how am i suppose to do tht

Answer 31

x=7.
Plug this in
6x-4y=54
6(7)-4y=54
42-4y=54
1.Subtract 42 both sides.
2.Divide by -4 both sides to find y.

Answer 32

i cant do this im so confused

Answer 33

42-4y=54
1.Subtract 42 both sides.
2.Divide by -4 both sides to find y.

Answer 34

Plz follow the steps

Answer 35

i am but so im suppose to subtract 42from -9

Answer 36

no. let me do one step and show.
42-4y=54
Subtract 42 both sides
42-42-4y=54-42
0-4y=12
-4y=12
Nw divide by -4 both sides to find y

Answer 37

-3x

Answer 38

-4y=12
Divide by -4 both sides
(-4y)/-4=12/-4
y=-3

Answer 39

ok i got it is there anymore we have to do

Answer 40

nope. evrythng is done:)

Answer 41

ok well can u show this all at once so i can write it down

Answer 42

can you @ajprincess

Answer 43

Extremely sorrry @yayasims21. busy right nw.

Answer 44

o alright illtry to put it together

Answer 45

hav u finished @yayasims21?

Answer 46

\(6x-4y=54-(1)\)
\(-9x+2y=-69-(2)\)
(2)*2=>\(-18x+4y=-138-(3)\)
(3)+(1)=>\(-18x+4y+6x-4y=-138+54\)
\(-12x=-84\)
\(-12x/-12=-84/-12\)
\(x=7\)
Substituting this in (1)=>
\(6(7)-4y=54\)
\(42-4y=54\)
\(-4y=54-42\)
\(-4y=12\)
\(-4y/-4=12/-4\)
\(y=-3\)