Solve the system of equations using elimination 2x+y=3 and 3x-y=12

1 answer:

3 0

2x + y = 3
3x - y = 12
Add both equations
5x = 15, x = 3
2(3) + y = 3
6 + y = 3, y = -3
Solution: x = 3, y = -3... or (3,-3)

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gayaneshka [121]

Wow ! If I understand what's go0ing on here, then
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I was going to ask you "What does Ф mean ?", and then I realized,
Ф is a new operation that the teacher invented.

The first line on the board is the definition of Ф .

Ф means "Add the two numbers and subtract 4."

Now you have to use this new invention to find the value
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Take care of the stuff inside the parentheses first: ( 4 Ф 2 )
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NOW, we have to do the new operation with the 2 inside,
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Hey there!

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A family spends 1/10 of its annual income for housing, 1/4 for food and clothing, 1/5 for general expenses, and 2/15 for enterta

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butalik [34]

Hope this helps....

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Lisa [10]

Answer:

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Step-by-step explanation:

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