Question

VA ROG!!! Gaseste multimea solutiilor sistemului:

2x-3y=1
x+2y=4

Answer 1

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Answer 2

{2x-3y=1

{x+2y=4|×(-2)

{2x-3y=1

{-2y-4y=-8

___________

| - 7y=7 y=7/-7

y=-1

{y=-1

{2x-3y=1 = 2x-3 ori (-1)=1

=2x-3=1

2x=1+3

2x=4

x=4/2

x=2/1 =2 { x=2 y=-1}

am folosit metoda reducerii