Răspuns :
(a+b)/2=12.3
a+b=12,3x2
a+b=24,6
a-b=6,8
a=b+6.8
b+6,8+b=24,6
2b=24,6-6,8
2b=17,8
b=8,6
a=8,6+6.8=15,4
a+b=12,3x2
a+b=24,6
a-b=6,8
a=b+6.8
b+6,8+b=24,6
2b=24,6-6,8
2b=17,8
b=8,6
a=8,6+6.8=15,4
a,b - Numerele
m arit = 12.3
a-b=6.8
m arit = a+b/2
12.3=a+b/2
a+b=24.6
a=b+6.8
b+6.8+b=24.6
2b+6.8=24.6
2b=24.6-6.8
2b=17.8
b=8.9
a+8.9=24.6
a=24.6-8.9
a=15,7
m arit = 12.3
a-b=6.8
m arit = a+b/2
12.3=a+b/2
a+b=24.6
a=b+6.8
b+6.8+b=24.6
2b+6.8=24.6
2b=24.6-6.8
2b=17.8
b=8.9
a+8.9=24.6
a=24.6-8.9
a=15,7
