Question

daca a+2b+c=36, a+b=15 si 2b+c=23 atunci valorile lui a b c sunt

Answer 1

a+b+b+c=36
a+b=15
15+b+c=36/-15
b+c=21
2b+c=23
b=23-21=2
2×2+c=23/-4
c=19
2+a=15/-2
a=13