1000 - x : 52 = 673
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a)
\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{47}\\{35}\end{array}}\\\hline{\,\,\,\,82}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{82}\\{47}\end{array}}\\\hline{\,\,\,35}\end{array}\)
\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{526}\\{147}\end{array}}\\\hline{\,\,\,\,673}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{673}\\{147}\end{array}}\\\hline{\,\,\,526}\end{array}\)
b) 350 + 42 – 105 = 392 – 105 = 287
1 000 – 300 + 77 = 700 + 77 = 777.
\(\Rightarrow\left(x-1\right)\in BC\left(52;35\right)=\left\{1820;3640;5460;...\right\}\)
\(\Rightarrow x\in\left\{1821;3641;5461;...\right\}\)
Mà \(1000< x< 2000\)
\(\Rightarrow x=1821\)
\(3,8=3\frac{8}{10};7,54=7\frac{54}{100};16,35=16\frac{35}{100};35,576=35\frac{576}{1000}\)
\(\frac{73}{10}=7\frac{3}{10}=7,3;\frac{86}{100}=0,86;\frac{5375}{1000}=5\frac{375}{1000}=5,375;\frac{673}{1000}=0,673;\frac{9356}{10000}=0,9356\)
\(128673-x=5050:5\\ 128673-x=1010\\ x=128673-1010\\ x=127663\)
a. X + 673 = 768
X = 768 – 673
X = 95
b. X : 7 = 427
X = 427 x 7
X = 2989
1000 - x : 52 = 673
x :52 = 1000 - 673
x : 52 = 327
x = 327 x 52
x = 17004.
1000 - x : 52 = 673
=> x : 52 = 1000 - 673
=> x : 52 = 327
=> x = 327 x 52
=> x = 17004