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Sati [7]
3 years ago
9

(06.01) Solve x + 3y = 9 3x − 3y = −13

Mathematics
1 answer:
Irina-Kira [14]3 years ago
4 0

Answer:

Slove For X

x= -1

Solve for Y

Y= 10/3

Step-by-step explanation:

SO I did Elimination method

To isolate X and to solve for it

x+3y=9

3x−3y=−13

Add these equations to eliminate y:

4x=−4

Solve for X

x=-1

Now plug x back in to solve for y

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C because 9*3 is 27, and 9 times 5 is 45 :D

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4 years ago
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Brainliest? I'll give it!
weeeeeb [17]

Answer:

x = 7

y =  - 6

Step-by-step explanation:

Add 4y to both sides in the first equation:

x = 31 + 4y

Substitute that new equation into the second equation:

- (31 + 4y) + 3y =  - 25

- 31  - 4y + 3y =  - 25

- 31 - y =  - 25

Add 31 to both sides:

- y = 6

Divide -1 on both sides:

y =  - 6

Substitute y=-6 in the third equation (first equation but modified)

x = 31 + 4y

x = 31 + 4 ( - 6)

x = 31 + ( - 24)

x = 31 - 24

x = 7

8 0
3 years ago
I need help with this please:)
Inessa05 [86]

Hi!

- - - - - - - - - - - - - - - - - - - -  

To start, let's add/subtract the fractions (by finding common denominators). Below them are your answers!

1) 1/2 (5/10) + 1/5 (2/10) = 7/10

1) Yes

2) 1/5 (2/10) - 1/10 (Same) = 1/10

2) No

3) 1/2 (5/10) + 2/5 (4/10) = 9/10

3) No

4) 4/5 (8/10) + 1/10 (Same) = 9/10

4) No

- - - - - - - - - - - - - - - - - - - -  

Have a great day/night! :)

~pinetree

5 0
3 years ago
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