(308 - (25+х) +7) : 5 = 7
308 - (25+х) +7 = 7 * 5
308 - (25+х) +7 = 35
308 - (25+х) = 35-7
308 - (25+х) = 28
25+х = 308 - 28
25 + х = 280
х= 280-25
х= 255
(308 - (25+х) +7) : 5 = 7
308 - (25+х) +7 = 7 * 5
308 - (25+х) +7 = 35
308 - (25+х) = 35-7
308 - (25+х) = 28
25+х = 308 - 28
25 + х = 280
х= 280-25
х= 255