2 years ago

2x + y = 3

Mathematics

2 answers:

OLEGan [10]2 years ago

7 0

The first answer is right

sergejj [24]2 years ago

4 0

Hey there!

First, multiply the second equation by -2 as the problem states. When you multiply the second equation by -2, you get:

-2x+4y=2

Now, add this equation to the first equation in which you simply combine like terms:

2x+y=3

-2x+4y=2

5y= 5

In conclusion, the correct answer would be the first choice.

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Using Linear combination method to solve:

$2d + e = 8\\d - e = 4\\$

Since "e" have the same coefficient in both equation with opposite operator; we will add.

$(2d + d) + (e - e) = (8 + 4)\\3d = 12\\$

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$\frac{3d}{3} = \frac{12}{3} \\d = 4\\$

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Therefore, the solution is (4, 0)

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