Помогите!!(5/7*X+40)+(3/4*X-118)=Х
5/7х+3/4х-х=118-40
13/28х=78
х=78:13/28=78*28/13=168
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5/7х+3/4х-х=118-40
13/28х=78
х=78:13/28=78*28/13=168