Question

daca as avea inca o data suma si inca o jumatate si inca un sfert din cit am miar mai lipsi un leu as avea 100 .cit am?

Answer 1

2xa+a/2+a/4+1=100
2a+a/2+a/4=99→ se aduc la acelasi numitor (4)
8a+2a+a=4x99
11a=396
a=396:11
a=36 → suma initiala
Verific: 2×36+ 36:2+36:4+1=72+18+9+1=100 (lei)

Answer 2

x - suma initiala
/ - linie de fractie

2*x+x/2+x/4+1=100
2*x+x/2+x/4=100-1
2x+x/2+x/4=99 | * 4
8x+2x+x=4*99
11x=396
x=36
                                                     R: 36