Răspunsuri

2014-11-10T19:53:30+02:00
A+a+1+a+2+a+3=54 4a+6=54 4a=54-6 4a=48 a=48÷4 a=12 Sper ca team ajutat
2014-11-10T19:54:47+02:00
X + (x+1) + (x+2) + (x+3) = 54
4x + 6 = 54
x = ( 54 - 6 ) : 4
x = 48 : 4
x = 12

R : 12

V:   12+13+14+15 = 25 + 29 = 54