a+a+a=72, b+b+b+b=100

Răspuns :

a+a+a=72
3a=72
a=72:3
a=24
24 +24 +24 = 72

b+b+b+b=100
4b=100
b=100:4
b=25
25+25+25+25=100
a + a + a = 72
3a = 72
a = 72 : 3
a = 24
b + b + b + b = 100
4b = 100
b = 100 : 4
b = 25