Автор - sh4ldy

Помогите пожалуйста найти x

Ответ

Автор - сок111213

 frac{16.5}{ frac{1}{45} +  frac{2}{9}  }  =  frac{x + 1.75}{ frac{7}{30} }  \  frac{16.5}{ frac{1}{45} +  frac{10}{45}  }  = frac{x + 1.75}{ frac{7}{30} } \ frac{16.5}{ frac{11}{45}  } =   frac{x + 1.75}{ frac{7}{30} }   \  frac{11}{45} (x + 1.75) =  frac{7}{30}  times 16.5 \ x + 1.75 =  frac{7 times 16.5}{30}  div  frac{11}{45}  \ x + 1.75 =  frac{7 times 16.5 times 45}{30 times 11}  \ x + 1.75 =  frac{7 times 16.5 times 3}{2 times 11}  \ x + 1.75 =  frac{346.5}{22}  \ x + 1.75 = 15.75 \ x = 15.75 - 1.75 \ x = 14

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