37,12/0,125+53.7/0.25-27.94*4 e cần gấp ạ
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x : 1 + x : 0,5 + x : 0,25 + x : 0,125 = 60
=> \(x+x:\frac{5}{10}+x:\frac{25}{100}+x:\frac{125}{1000}=60\)
=> \(x+x\cdot\frac{10}{5}+x\cdot\frac{100}{25}+x\cdot\frac{1000}{125}=60\)
=> \(x+x\cdot2+x\cdot4+x\cdot8=60\)
=> x(1 + 2 + 4 + 8) = 60
=> x.15 = 60
=> x = 4
Bài làm
\(x:1+x:0,5+x:0,25+x:0,125=60\)
\(x:1+x:\frac{5}{10}+x:\frac{25}{100}+x:\frac{125}{1000}=60\)
\(x:\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\right)=60\)
\(x:\left(\frac{8}{8}+\frac{4}{8}+\frac{2}{8}+\frac{1}{8}\right)=60\)
\(x:\frac{15}{8}=60\)
\(x=60x\frac{15}{8}\)
\(x=112,5\)
Vậy \(x=112,5\)
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\(\left(126,74\times126,72+18,63:0,9\right)\times\left(126-12,6:0,125-12,6\times2\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6:0,125+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-\left(12,6\times8+12,6\times2\right)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left\{126-\left[12,6\times\left(8+2\right)\right]\right\}\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left[126-(12,6\times10)\right]\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times\left(126-126\right)\)
\(=\left(126,74\times126,72+18,63:0,9\right)\times0\)
\(=0\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x:0,125+x:0,25-x:20\%-24=11\)
\(x:\dfrac{1}{8}+x:\dfrac{1}{4}-x:\dfrac{1}{5}-24=11\)
\(8\times x+4\times x-5\times x-24=11\)
\(7\times x=35\)
\(x=5\)
\(\text{x : 0 , 125 + x : 0 , 25 − x : 20 % − 24 = 11}\)
\(x : 0 , 125 + x : 0 , 25 − x : 0 , 2 − 24 = 11\)
\(x:\dfrac{1}{8}+x:\dfrac{1}{4}-x:\dfrac{1}{5}-24=11\)
\(x:\dfrac{1}{8}+x:\dfrac{1}{4}-x:\dfrac{1}{5}=24+11\)
\(x:\dfrac{1}{8}+x:\dfrac{1}{4}-x:\dfrac{1}{5}=35\)
\(\text{x ×}\dfrac{8}{1}+x\text{×}\dfrac{ }{ }+\dfrac{4}{1}-x\text{×}\dfrac{5}{1}=35\)
\(x × 8 + x × 4 − x × 5 = 35\)
\(x × ( 8 + 4 − 5 ) = 35\)
\(x × 7 = 35\)
\(x = 35 : 7\)
\(x = 5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
x:1/4+x:1/8+x:1/2+1=0,90
x*4+x*8+x*2+x*1=0,90
x*(4+8+2+1)=0,90
x*15=0,90
x=0,06
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\(\text{13,25:0,5+13,25:0,25+13,25:0,125-13,25:0.25}\)
\(=13,25:\left(0,5+0,25+0,125-0,25\right)\)
\(=13,25:0,625\)
\(=21,12\)
học tốt
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