Question

help me math

Answer 1

What is the value of the x variable in the solution to the following system of equations?

3x − 6y = 3
7x − 5y = −11

−2

−3

x can be any number as there are infinitely many solutions to the system.

There is no x value as there is no solution to the system.

Question 5 (Multiple Choice Worth 2 points)

What is the value of the x variable in the solution to the following system of equations?

4x + 2y = 6
x – y = 3

−1

5

−2

2

Answer 2

@fredloser do you know how to solve a system of equations?

Answer 3

a little

Answer 4

Which method we can use here?

Answer 5

the easy version :)

Answer 6

I meant
1) Substitution
2) Elimination
Pick the easy one

Answer 7

A

Answer 8

Ok, do you know how should we proceed?

Answer 9

subtract part 1 from part 2?

Answer 10

No that would be elimination

Answer 11

oh

Answer 12

Find x in terms of y from first equation, I'll give you a hint
\[3x-6y=3\]
Divide both sides by 3 and subtract 6y from both sides

Answer 13

*2y

Answer 14

x-3y=3

Answer 15

right?

Answer 16

Check again!

Answer 17

ok

Answer 18

can you make an example problem please

Answer 19

I will show you an example
\[2x+4y=4\]
and
\[x+y=9\]
From first we'll find x and then substitute in the second
\[2x+4y=4\]
Divide both sides by 2, we get
\[x+2y=2\]
Now subtract 2y from both the sides
\[x=2-2y\]
Now let's substitute this in second
\[x+y=9\]
We found \(x=2-2y\)
so
\[2-2y+y=9\]
Now we can find y
\[2-y=9=>y=-7\]
Now we have y, we can find x
\[x=2-2y=2-2(-7)=>x=2+14\]
so
\[x=16\]

Answer 20

@fredloser do you understand?

Answer 21

yes

Answer 22

Now try this here, :)

Answer 23

Find x in terms of y from first equation, I'll give you a hint
3x−6y=3

Divide both sides by 3 and subtract 6y from both sides

Answer 24

x-3y=3
x-3+3y

Answer 25

right?

Answer 26

x-3=3y

Answer 27

\[3x-6y=3\]
divide both sides by "3"
\[x-2y=1\]
???

Answer 28

oh divide by 3

Answer 29

Yeah now proceed with the solving

Answer 30

want me too do the second one?

Answer 31

7x − 5y = −11

Answer 32

We found
\[x-2y=1\]
So
\[x=1+2y\]
Substitute this in second and find the value of y

Answer 33

the second one is 7x − 5y = −11

Answer 34

Yeah
\[ 7(1-2y)-5y=-11\]

Answer 35

so what do we do with that information?