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{[27*x-79)*61-78]*15+340}:250=4

Răspuns :

{[(27x-79)*61-78]*15+340}:250=4
{[(27x-79)*61-78]*15+340} = 250*4 = 1000
[(27x-79)*61-78]*15 = 1000-340 = 660
(27x-79)*61-78 = 660:15 = 44
(27x-79)*61 = 44+78 =122
27x-79 = 122:61 = 2
27x= 2+79 = 81
x=81:27 = 3

x=3