( 327х - 5 295 ) : 57 = 389
327х - 5 295 =389 * 57
327х - 5 295 =22 173
327х =22 173 +5 295
327х =27 468
х =27 468 : 327
х =84
проверка:
( 327 *84 - 5 295) : 57 = 389
( 27х +11) *315 =11 970
27х +11= 11 970 : 315
27х +11 =38
27х=38 - 11
27х =27
х =27 :27
х=1
проверка:
( 27 * 1 +11) *315= 11 970
