Răspuns :
a=suma de bani pe care o are mama
x=cat costa o pereche de schiuri
a=x+284
a+69=2x, a=2x-69,
2x -69=x+284, x=284+69, x=353
a=353+284, a=637
a=suma de bani pe care o are mama
x=cat costa o pereche de schiuri
a=x+284
a+69=2x, a=2x-69,
2x -69=x+284, x=284+69, x=353
a=353+284, a=637