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22-07-2017
Mathematics

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Find the solution of this system of equations. separate the x- and y-values with a comma. x= 8 + y -2x + 6y= -20

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Banabanana Banabanana

22-07-2017

{x= 8 + y
{-2x + 6y= -20

-2(8+y) + 6y = -20
-16 - 2y + 6y = -20
4y = -20 + 16
4y = -4
y = -1

x = 8 + y = 8 + (-1) = 7

Answer: x = 7, y = -1

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