Quadgirl2019 Quadgirl2019
  • 13-11-2018
  • Mathematics
contestada

find the solution of this system of equations -2x+8y=14 and -2x-2y=-26

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Аноним Аноним
  • 13-11-2018

Note that both equations contain -2x so if we subtract them this will disappear.

-2x + 8y = 14

-2x - 2y = -26       Subtract:-

0  + 10y = 40

y = 4

Substitute fro y in the first equation:-

-2x + 8(4) = 14

-2x = 14 - 32 = -18

x = 9


Answer x = 9   y = 4

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