Question

Verificati daca ecuatia 2x-6y+4=0 are ca solutie perechea de numere
a) (1;1)
b) (0;-1)
c) (-5;-1)
d) (-2;0)
ecuatii de gradul 1 cu 2 necunoscute urgent!!!!!!!

Answer 1

2x-6y+4=0

2x-6y=0-4

2x=0-4+6y

2(0-4+6y) +6y+4=0

0-8+12y+6y+4=0

0-8+18y+4=0

0-8+18y=0-4=(-4)

-8+18y=(-4)

18y=4

4:18=0.2222222222

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