Question

x plus 2y egal 24 si x plus y egal 19. y egal?

Answer 1

Răspuns:

x+2y=24

x+y=19

y=19-x

x+19-x=24

x=24

-y=24-19

-y=5

y=-5

am scos minusurile cât de mult am putut dar y=-5