Ответ: 13/2x +7/2*3=(11+5)+(4/17+13/17)
13/2x+21/2=16+1
13/2x+21/2=17
13x+21=34
13x=34-21
13x=13
x=1
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Ответ: 13/2x +7/2*3=(11+5)+(4/17+13/17)
13/2x+21/2=16+1
13/2x+21/2=17
13x+21=34
13x=34-21
13x=13
x=1