Xx3\5+Xx1\2=11\15
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(Xx1)+(Xx2)+(Xx3)+(Xx4)=50
=>4xX+10=50
=>4xX=50-10
=>4xX=40
=>X=40:10
=>X=4
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a) \(x:\frac{1}{2}=4\)
\(x=4\times\frac{1}{2}\)
\(x=2\)
b)\(x\times\frac{3}{5}=15\)
\(x=15:\frac{3}{5}\)
\(x=25\)
a) \(\text{X}\div\frac{1}{2}=4\)
\(\text{X}=4\times\frac{1}{2}\)
\(\text{X}=2\)
b) \(\text{X}\times\frac{3}{5}=15\)
\(\text{X}=15\div\frac{3}{5}\)
\(\text{X}=25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Xx\(\frac{1}{4}\)+Xx\(\frac{1}{5}\)+Xx2=19,6
XxXxX=19,6:2:\(\frac{1}{5}\):\(\frac{1}{4}\)
Xx3=196
X=196:3
X=\(\frac{196}{3}\)
nhé bạn
\(x.\frac{1}{4}+x.\frac{1}{5}+x.2=19.6\)
\(x.\left(\frac{1}{4}+\frac{1}{5}+2\right)=19,6\)
\(x.2,45=19,6\)
\(x=19,6:2,45\)
\(x=8\)
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a)\(\frac{5}{9}\times x-1=\frac{8}{9}\)
\(\frac{5}{9}\times x=\frac{8}{9}+1\)
\(\frac{5}{9}\times x=\frac{17}{9}\)
\(x=\frac{17}{9}:\frac{5}{9}\)
\(x=\frac{17}{5}\)
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a)\(x+\dfrac{2}{3}x\dfrac{5}{6}=7\)
\(x+\dfrac{10}{18}=7\)
\(x=7-\dfrac{10}{18}\)
\(x=\dfrac{58}{9}\)
b)\(9-xx\dfrac{1}{2}=\dfrac{3}{4}\)
\(xx\dfrac{1}{2}=9-\dfrac{3}{4}\)
\(xx\dfrac{1}{2}=\dfrac{33}{4}\)
\(x=\dfrac{33}{4}:\dfrac{1}{2}\)
\(x=\dfrac{33}{2}\)
c)\(18-x:\dfrac{2}{3}=\dfrac{4}{5}-\dfrac{1}{10}\)
\(18-x:\dfrac{2}{3}=\dfrac{7}{10}\)
\(x:\dfrac{2}{3}=18-\dfrac{7}{10}\)
\(x:\dfrac{2}{3}=\dfrac{173}{10}\)
\(x=\dfrac{173}{10}x\dfrac{2}{3}\)
\(x=\dfrac{173}{15}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1+1+1+1+1+1+2+5+10+4+7=34
(1+9)+(2+8)+(3+7)+(4+6)+(5+5)+(10+0)
=10+10+10+10+10+10
=10x6
=60
Xx1+3=7
X+3=7x1
X+3=7
X=7-3
X=4