thefaria thefaria

14-07-2017
Mathematics

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Find the solution of this system of equations.
Separate the x- and y-values with a comma.
x= 5 + y
28x – 9y= -12

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choixongdong choixongdong

14-07-2017

x= 5 + y
28x – 9y = -12

substitute x= 5 + y into 28x – 9y = -12

28x – 9y= -12
28(5 + y) – 9y = -12
140 + 28y - 9y = -12
19y = -152
y = -8

x = 5 + y
x = 5 - 8
x = -3

solution (-3, -8)

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