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a+b=306. a÷(b÷2)= 6 (r18)

Răspuns :

a=6•b/2+18
a=3b+18

3b+18+b=306
4b=288
b=72
a=234
a+b=306
a:(b:2)=6 rest 18⇒ a=6b:2+18⇒ a=3b+18
3b+18+b=306
4b=306-18
4b=288
b=288:4
b=72
a=3x72+18=216+18
a=234
V: 234+72=306
    234:(72:2)=234:36=6 rest 18