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PSYCHO15rus [73]
2 years ago
13

I need help rq

Mathematics
1 answer:
Yanka [14]2 years ago
7 0

We have the system of equations:

x - 2y = 2

3x + y = 6

From equation 1 we express y.

                                 x - 2y = 2

We pass the addend with the variable x from the left to the right and change the sign.

                                 -2y = 2 - x

We divide both parts of the equation by the multiplier of y.

                                \dfrac{(-1)2y}{-2}=\dfrac{2-x}{-2}

                                       y=\dfrac{x}{2}-1

We put the result y in equation 2.

                                          3x + y = 6

We obtain:

                                   3x+\left(\dfrac{x}{2}-1\right)=6

                                            \dfrac{7x}{2}-1=6

We pass the free addend -1 from the left to the right, changing the sign.

                                             \dfrac{7x}{2}=1+6

                                             \dfrac{7x}{2}=2

We divide both parts of the equation by the multiplier of x.

                                             \dfrac{\frac{7}{2}x }{\frac{7}{2} }=\dfrac{7}{\frac{7}{2}}

                                              x=2

What

                                             y=\dfrac{x}{2}-1

then

                                            y=-1+\dfrac{1}{2}\cdot2

                                            y=0

Answer:

  • y = 0
  • x = 2

Therefore, the correct option is C.

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