llogan90 llogan90
  • 23-04-2021
  • Mathematics
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Solving the following simultaneous equations, 4x - 5y = 17 and x - 5y = 8,

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Witcher3
Witcher3 Witcher3
  • 23-04-2021

{4x - 5y = 17

{x - 5y = 8

{x = 5y + 8

{4(5y + 8) - 5y = 17

{x = 5y + 8

{20y + 32 - 5y = 17 | - 32

{x = 5y + 8

{15y = -15 | : 15

{y = -1

{x = 5 * (-1) + 8

{x = 3

{y = -1

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