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Solve x +y=0 ;2x+y=18​
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Solve x +y=0 ;2x+y=18​

User Mick Cullen
by
7.7k points

1 Answer

3 votes

Answer:

x+y=0

2x+y=18​

per substitution:

y = -x+0

we replace y in the other equation:

2x-x+0=18

x=18

we calculate y:

x+y=0

18+y=0

y=-18

solution (18;-18)

User Adam Bertram
by
8.0k points
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