Răspuns :
a+b+c+d=102 a+b=(c+d)+6 c+d+6+c+d=102 1(c+d)=102-6 c+d=96/2=>c+d=48 c+c+2=48=>2c=46=>c=23 d=25 a+b=23+25+6=54 a+a+2=54=>2a=54-2=>a=52/2=>a=26 b=38
Răspuns:
a=26
b=28
c=23
d=25
Explicație pas cu pas:
a+b+c+d=102
a+b=c+d+6
a si b sunt nr.pare consecutive => b=a+2
c si d sunt nr.impare consecutive => d=c+2
=> a+a+2=c+c+2+6 => 2a+2=2c+8
rescriem:
2a+2+2c+8=102
4c+10=102
4c=102-10
4c=92
c=92:4
c=23 => d= 23+2 => d=25
2a+2=23+25+6
2a+2=54
2a=52-2
2a=52
a=52:2
a=26 => b=26+2 => b=28
verificare:
26+28+23+25=
=54+48=
=102
26 si 28 sunt nr. pare consecutibe
23 si 25 sunt nr. impare consecutive
26+28 > 23+25 cu 6
54 > 48 (54-48 =6 )