Question

19. Solve the following by elimination:

3y - 1.6x = -15.4
8y - 2x = -32

Answer 1

show your work please & thank you <3 I will give a medal (:

Answer 2

you will hv to multiplu first bu 2 n 2nd by 1.6

Answer 3

so it would be 3y - 1.6x * 2 = -15.4?

Answer 4

multiply by*

Answer 5

no

Answer 6

2(3y-1.6x) = 2*15.4

Answer 7

oh okay, hold on let me solve that

Answer 8

okay

Answer 9

is it 2 * -15.4? at the end of the problem you gave me

Answer 10

yeah

Answer 11

so would it be 6y - 3.2x = -30.8 ?

Answer 12

yes
now multiply 2nd by 1.6

Answer 13

2nd?

Answer 14

equation

Answer 15

8y - 2x = -32 this one

Answer 16

so would it be 12,8y - 3.2x = -51.2

Answer 17

good

Answer 18

now,you have two equations
6y - 3.2x = -30.8
and 12.8y - 3.2x = -51.2
now if you sutract equation 2 from 1,-3.2x term will get canceled

Answer 19

so you have (6y-3.2x) - (12.8y-3.2x) = -30.8 -(-51.2)

Answer 20

so 6y-12.8y = =20.4

Answer 21

-6.8y= 20.4
so y = -3

Answer 22

put this value in other equation and find x

Answer 23

3,2x - 3.2x ?

Answer 24

uh huh

Answer 25

= 0 ?

Answer 26

what do you wanna know exactly

Answer 27

8y - 2x = -32
8(-3) -2x = -32
-24-2x=-32
2x=8
x=4