All categories

3 years ago

Use substitution to solve 1-2. 3x – 3y = 9 x= 7 – 3y

Mathematics

1 answer:

kondaur [170]3 years ago

8 0

Answer:

Solutions are x =4 and y = 1

Step-by-step explanation:

$3x-3y =9$

In this equation substitute $x=7-3y$ , we get

$3(7-3y) -3y=9\\21-9y-3y=9\\-12y= 9-21\\-12y= -12\\y=1$

now substitute y =1 in x equation,

$x=7-3(1)\\x=7-3\\x=4$

Solutions are x =4 and y = 1

You might be interested in

Solve the proportion 15t5=2t 36.

olchik [2.2K]

If you can give me more info, I can solve this for you, please write out the complete problem.

6 0

2 years ago

The graph of a system of linear equations shows 2 lines with different slopes.

pochemuha

they are the same lines

x and y are the same

Step-by-step explanation:

i dont know for sure so bye god bless

4 0

2 years ago

Re-write the following expressions with the fewest terms possible: 12x-10-8x+99y+6

dimaraw [331]

12x - 10 - 8x + 99y + 6

With the fewest terms possible is

4x + 99y - 4

⭐ Please consider brainliest! ⭐

✉️ If any further questions, inbox me! ✉️

6 0

3 years ago

Here is my answer to ur question

bagirrra123 [75]

Uh Answer to what-
Bro you good?

6 0

2 years ago

Which expression is equivalent to r to the 9th over r to the 3rd

alisha [4.7K]

Answer:

$r^{6}$

Step-by-step explanation:

To make this a bit easier to see, we'll expand that expression.

R to the 9th is just r times itself 9 times. R to the third is r times itself 3 times.

(excuse my bad formatting)

The expression:

r • r • r • r • r • r • r • r • r • 1

r • r • r • 1

Remember, anything and everything has a coefficient or denominator of 1.

So, we can cancel 3 r's from the numerator and denominator.

r • r • r • r • r • r • 1

Simplify....

$\frac{1r^{6}}{1}$

That just equals $r^{6}$ .

3 0

2 years ago