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\(x\cdot5.3=9.01\cdot4\)
\(x\cdot5.3=36.04\)
\(x\) \(=36.04:5.3\)
\(x\) \(=6.8\)
\(x-54.67=45.05:5\)
\(x-54.67=9.01\)
\(x\) \(=9.01+54.67\)
\(x\) \(=63.68\)
\(x\times5,3=9,01\times4\)
\(x\times5,3=36,04\)
\(x=6,8\)
\(x-54,67=45,05:5\)
\(x-54,67=9,01\)
\(x=63,68\)
\(1-x=\frac{29}{12}+\frac{32}{8}\)
\(\Rightarrow1-x=\frac{77}{12}\)
\(\Rightarrow x=1-\frac{77}{12}=\frac{-65}{12}\)
\(\frac{31}{8}.x-\frac{11}{4}=\frac{42}{12}.\frac{10}{8}-\frac{1}{3}\)
\(\Rightarrow\frac{31}{8}.x-\frac{11}{4}=\frac{35}{8}-\frac{1}{3}\)
\(\Rightarrow\frac{31}{8}.x-\frac{11}{4}=\frac{97}{24}\)
\(\Rightarrow\frac{31}{8}.x=\frac{97}{24}+\frac{11}{4}=\frac{163}{24}\)
\(\Rightarrow x=\frac{163}{24}:\frac{31}{8}=\frac{163}{93}\)
1,23 x 99 + 1,23 x 25% + 1,23 x 3/4
= 1,23 x 99 + 1,23 x 1/4 + 1,23 x 3/4
= 1,23 x (99 + 1/4 + 3/4)
= 1,23 x 100
= 123
1,23 x 99 + 1,23 x 25% + 1,23 x 3/4
= 1,23 x 99 + 1,23 x 0,25 + 1,23 x 0,75
= 1,23 x (99 + 0,25 + 0,75)
= 1,23 x 100
= 123
Chúc bạn học tốt.
😁😁😁
\(\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}+...+\frac{1}{999\times1000}+1\)
\(=\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+....+\frac{1}{999000}+1\)
\(=1-\frac{1}{1000}+1\)
\(=\frac{1999}{1000}\)