anlikeraaron5 anlikeraaron5

24-04-2021
Mathematics

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-6х-у = -27
18х+Зу=81

Solve the system of equations

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viktoria80 viktoria80

24-04-2021

-6x-y=-27
18x+3y=81

-6x-y=-27
-6x -6x
-y = 27-6x
/-1 /-1
y=-27+6x

18x+3y=81
18x+3(-27+6x)=81
18x+-81+18x=81
+81 +81
36x=162
/36 /36
X=4.5

y=-27+6x
y=-27+6(4.5)
y=-27+27
y=0

(4.5,0)

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