Question

Are ceva daca fac sistemul asa la metoda substiei?

Answer 1

Răspuns:

1x=2-1y => 2x+3y=5= (2-1y)•2+3y=5

=4-2y+3y=5

=4+1y=5

=1y=5-4

=1y=1

1x+1y=2 => 1x+1=2

1x=2-1

1x=1