jm8q3hr725
jm8q3hr725 jm8q3hr725
  • 26-02-2021
  • Mathematics
contestada

Solve this equation and identify the solution

Solve this equation and identify the solution class=

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AnimalPost
AnimalPost AnimalPost
  • 26-02-2021

Answer:

(3, -1)

Step-by-step explanation:

The easiest way to solve this system of equations is by elimination:

3x + y = 8

2x - y = 7

Add the two equations together:

(3x + 2x) + (y - y) = (8 + 7)

5x = 15

x = 3

Substitute x back into the equation:

2x - y = 7

2(3) - y = 7

6 - y = 7

- y = 1

y = -1

The fourth option, (3, -1)

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