All categories

3 years ago

Solve the system of linear equations. 3x−2y=1 9x−6y=3

1 answer:

8 0

Get the y by itself

-2y= -3x + 1

Divide -2 to everything

y= 3/2x - 1/2

Other equation (get y by itself)

-6y= -9x + 3
y=3/2x - 1/2

Use substitution

3/2x-1/2=3/2-1/2

0=0

All real numbers (any value of x makes the equation true)

You might be interested in

What is the greatest common factor of 8 and 9

ExtremeBDS [4]

I believe the answer is 1. One is the only number that can go into both 8 and 9.

3 0

2 years ago

Read 2 more answers

Jason is three roommates share the cost of the electric bill $108 evenly

I am Lyosha [343]

Its $36 if it is only for his three roommates
and
$27 if it is only for his three roommates w/ Jason

4 0

3 years ago

Select the statement that does not correctly use probability to describe an

tatuchka [14]

I think its D since it’s known that if today is Tuesday tomorrow will be Thursday

7 0

2 years ago

What is the solution to 4m-4+4m

Sholpan [36]

Answer:

- 4 + 8m

Step-by-step explanation:

4m - 4 + 4m = ?

4m + 4m = 8m

- 4 + 8m is the answer because you can not simplify it anymore.

7 0

3 years ago

Solve the system of equations. 2y+7x=−5 5y−7x=12

3241004551 [841]

We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

$5y-7x=12$

$5y-7x-12=0$

$5y-12=7x$

Therefore, $7x=5y-12$

Now replace the 7x in the first equation with 5y - 12:

$2y+7x=-5$ (substitute in 7x = 5y - 12)

$2y+(5y-12)=-5$

$7y-12=-5$

$7y=7$

$y=1$

Now that we know y, we can find x by substituting in y = 1 into any equation we want. I will use the equation: 7x = 5y - 12

$7x=5y-12$ (substitute in y = 1)

$7x=5(1) -12$

$5x=5-12$

$7x=-7$

$x=-1$

__________________________________________________________

Answer:

$y=1\\x=-1$

4 0

3 years ago