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Vladimir79 [104]
3 years ago
7

Solve the following system of equations for x 2x-y=4 y-x=4

Mathematics
2 answers:
Dominik [7]3 years ago
6 0

Answer:

x = 8

y = 12

Step-by-step explanation:

Given equations are -

2x - y = 4         .......(1)

-x + y = 4         ........(2)

Add both equations, we get

2x - y + (-x + y) = 4 + 4

⇒2x - y - x + y = 8

⇒x = 8

Now,

Put the value of x in equation (2), we get

y - 8 = 4

⇒y = 4 + 8

⇒y = 12

∴ we get

x = 8

y = 12

Yuliya22 [10]3 years ago
4 0

Answer:

What do i do???

Step-by-step explanation:

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Answer:

Peyton: 6 years old

Matt: 24 years old

Justin: 9 years old

Step-by-step explanation:

P= Peyton   M= Matt   J= Justin

P=J-3

M=4P

J+P+M=39

4J-12=M  4J-12=39-J-P

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5J-51=-J+3    J=9

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6 0
3 years ago
Does anyone know how to do this two-column proof?
scZoUnD [109]
Where is the proof you need help with?
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40% of the students in a school band play brass instruments while 4 students play strings instruments
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Answer:

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Step-by-step explanation:

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It is just as easy to show it rather than doing it.

8 0
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