ruthmoise2847 ruthmoise2847
  • 25-10-2018
  • Mathematics
contestada

​ 2x+7y=1 y=4x−8 ​ Is (4,8) a solution of the system?

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fatpanda15
fatpanda15 fatpanda15
  • 25-10-2018

You would plug in 4 for x and 8 for y giving you,

2(4) + 7(8) = 1

8 = 4(4) - 8

Now multiply the number together getting,

8 + 56 = 1

8 = 16 - 8

Now add/subtract,

64=1

8=8

While the second equation is true, the first is not. This would make (4,8) not a solution to the system.

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changyongshin05 changyongshin05
  • 20-03-2020

Answer:

It's not a solution to the system.

Step-by-step explanation:

Answer Link

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