anac2019 anac2019

16-10-2018
Mathematics

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Solve the system of equations by elimination. 2x-y+3z=-1, x+2y-4z=-1, y-2z=0

Respuesta :

abbylee78 abbylee78

16-10-2018

16, 3x-y=4

3x-3x-y=4-3x

-y=4-3x(multiply both sides by -1 to get...)

y=3x-4

17. -4x-5y=20

-4x+4x-5y=20+4x

5y=4x+20
5y/5=4/5x+20/5
y=4/5x+4

19,
-3x+7(0)=-21
-3x=-21
-3x/-3=-21/-3
x=7

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