Răspuns :
a+b=30.5
a=b+2.7
b+2.7+b=30.5
2b+2.7=30.5
2b=27.8
b=13.9
a=13.9+2.7
a=16.6
a=b+2.7
b+2.7+b=30.5
2b+2.7=30.5
2b=27.8
b=13.9
a=13.9+2.7
a=16.6
a+b=30,5
a=2,7+b
2,7+b+b=30,5
2,7+2b=30,5
2b=27,8
b=13,9
a=2,7+13,9
a=16,6
a=2,7+b
2,7+b+b=30,5
2,7+2b=30,5
2b=27,8
b=13,9
a=2,7+13,9
a=16,6