afla numarul necunoscut 234+[(88÷4+m)-78÷6]×23=809

Răspuns :

234+[(88÷4+m)-78÷6]×23=809
234+[(22+m)-13]x23 = 809
[(22+m)-13]x23 = 809-234
[(22+m)-13]x23 = 575
(22+m)-13 = 575:23
(22+m)-13 = 25
22+m = 25+13
22+m = 38
m = 38-22
m = 16