Question

Solve using elimination:
6x − 2y − 3= 0
4y − 4x = -6
Select one:
a. (0, -3/2)
b. (2, 9/2)
c. (7, 4)
d. (-8,-5)

Answer 1

4y-4x=-6
add 4x on both side and tell what u got

Answer 2

First arrange both equations in standard form, giving us:
6x - 2y = 3 ...........(1)
-4x +4y = -6 ........(2)
If we multiply both sides of equation (1) by 2, we will make the coefficient of y equal and opposite to the coefficient of y in equation (2). Therefore we will have these two equations:
12x -4y = 6 .........(3)
-4x +4y = -6 ........(2)
If equations (3) and (2) are now added together, we will eliminate the terms in y and be able to find the value of x. Can you do that?

Answer 3

@gorv Sorry, I did not know you were helping with this.

Answer 4

14x?

Answer 5

@kropot72

Answer 6

12x -4y = 6 .........(3)
-4x +4y = -6 ........(2)
If we add equations (3) and (2) we get:
12x - 4x -4y + 4y = 6 - 6 ..............(4)
Now you need to simplify equation (4) by combining like terms. Can you do that?

Answer 7

so times 4 by 12?

Answer 8

8x=0 ?

Answer 9

Yes, you are correct. 8x = 0, therefore x = 0.
Now if you plug the value of x into equation (2) you can find the value of y.

Answer 10

so then a? @kropot72

Answer 11

Yes, a is the correct choice.

Answer 12

gracias @kropot72

Answer 13

You're welcome :)