Ответ:
(х-15)-8=17
(х-15)=17+8
(х-15)=25
х=25+15
х=40
(40-15)-8=17
17=17
(x-15)-8=17
(x-15)=17+8
(x-15)=25
x=25+15
x=40
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Ответ:
(х-15)-8=17
(х-15)=17+8
(х-15)=25
х=25+15
х=40
(40-15)-8=17
17=17
Ответ:
(x-15)-8=17
(x-15)=17+8
(x-15)=25
x=25+15
x=40
--------------------
(40-15)-8=17
17=17