5,732+(х+7,269)=645
х+7,269=645-5,732
х+7,269=639,268
х=639,268-7,269
х=631,999
проверка
5,732+(631,999+7,269)=645
5,732+639,268=645
645=645
5,732+(х+7,269)=645x+7.269=645-5.732x+7.269=639.268x=639.268-7.269x=631,999
5,732+(х+7,269)=645
х+7,269=645-5,732
х+7,269=639,268
х=639,268-7,269
х=631,999
проверка
5,732+(631,999+7,269)=645
5,732+639,268=645
645=645
5,732+(х+7,269)=645
x+7.269=645-5.732
x+7.269=639.268
x=639.268-7.269
x=631,999