Răspuns :
a+a+1+a+2+a+3=94
4xa+6=94
4xa=94-6
4xa=88
a=88:4
a=22
a+1=23
a+2=24
a+3=25
verificare: 22+23+24+25=94
4xa+6=94
4xa=94-6
4xa=88
a=88:4
a=22
a+1=23
a+2=24
a+3=25
verificare: 22+23+24+25=94
a+b+c+d=94
b=a+1
c=a+2
d=a+3
a+a+1+a+2+a+3=>4xa+6=94=>4xa=88=>a=88:4=>a=22