Question

(1/12+19/6-30,75). x-8 =(3/5+0,415+1/200):0.01. tìm x nha

Answer 1

Ta làm vế kia trước:

\(\left(\frac{3}{5}+0,415+\frac{1}{200}\right):0,01=\left(\frac{3}{5}+\frac{83}{200}+\frac{1}{200}\right):0,01\)

\(=\left(\frac{120}{200}+\frac{83}{200}+\frac{1}{200}\right):0,01\)

\(=\frac{204}{200}:\frac{1}{100}=\frac{51}{50}.100=102\)

=>  \(\left(\frac{1}{12}+\frac{19}{6}-30,75\right).x-8=102\)

   \(\left(\frac{1}{12}+\frac{19}{6}-\frac{123}{4}\right).x=102+8=110\)

    \(\left(\frac{1}{12}+\frac{38}{12}-\frac{369}{12}\right).x=110\)

     \(-\frac{330}{12}.x=110\)

     \(-\frac{55}{2}.x=110\)

     \(x=110:-\frac{55}{2}=110.-\frac{2}{55}=-4\)

 

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