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a) \(210:x=2,1:0,25=8,4\)
\(x=210:8,4=25\)
b) \(x.2+x.0,5=6,25\)
\(2,5x=6,25\)
\(x=6,25:2,5=2,5\)
c) \(x:0,25-x=15,6\)
\(3x=15,6\)
\(x=5,2\)
d) \(x:12,5=3,75.4=15\)
\(x=15.12,5=187,5\)
e) \(x.12,6-x.5,6=42\)
\(7x=42\)
\(x=6\)
g) \(x:0,1-x:4-x.0,75=2,25\)
\(10x-\dfrac{x}{4}-\dfrac{3x}{4}=2,25\)
\(9x=2,25\)
\(x=0,25\)
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\(x\) : 4+ \(x\) = 3,75
\(x\)x 0,25 + \(x\)=3,75
\(x\)x( 1 + 0.25) = 3,75
\(x\)x 1,25 = 3,75
\(x\) = 3,75 : 1,25
\(x\) = 3
x : 4 + x = 3,75
x/4 + x = 3,75
x/4 + x/1 = 3,75
x/4 + x nhân 4/ 4 = 3,75
x nhân 5/ 4 = 3,75
x nhân 5 = 3,75 x 4
x nhân 5 = 15
x = 15 : 5
x = 3
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3.75 : \(\dfrac{1}{4}\) + 3.75 : 0.5 + 3,75 + \(\dfrac{1}{8}\) + 3,75 x 86
= 3,75 : \(\left(\dfrac{1}{4}+0.5+\dfrac{1}{8}\right)\) + 3,75 x 86
= 3,75 : \(\dfrac{7}{8}\) + 322.5
= 4,3 + 322.5 = 326,8
tích hộ chị nha
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x : 4 + x = 3,75
\(x\)x\(\frac{1}{4}\) + \(x=3,75\)
\(x\)x\(\left(\frac{1}{4}+1\right)=\frac{375}{100}\)
\(x\)x\(\frac{5}{4}=\frac{15}{4}\)
\(x=\frac{15}{4}:\frac{5}{4}\)
\(x=\frac{15}{4}\)x\(\frac{4}{5}\)
\(x=3\)
\(\frac{x}{4}+x=3.75\)
\(x\left(\frac{1}{4}+1\right)=\frac{15}{4}\)
\(x\cdot\frac{5}{4}=\frac{15}{4}\)
\(x=\frac{15}{4}:\frac{5}{4}=3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.7,5\times x+x\times3,5=39,93\)
\(\Rightarrow x\times\left(7,5+3,5\right)=39,93\)
\(\Rightarrow x\times11=39,93\)
\(\Rightarrow x=39,93:11\)
\(\Rightarrow x=3,63\)
\(b.x:4+x=3,75\)
\(\Rightarrow x:\frac{4}{1}+x=3,75\)
\(\Rightarrow x\times\frac{1}{4}+x=3,75\)
\(\Rightarrow x\times\left(\frac{1}{4}+1\right)=3,75\)
\(\Rightarrow x\times1,25=3,75\)
\(\Rightarrow x=3,75:1,25\)
\(\Rightarrow x=3\)
a) 7,5 *x + x*3,5=39,93
(7,5 + 3,5) * x=39,93
11 * x = 39,93
x= 39,93 : 11
x= 3,63
b)x : 4 + x=3,75
x * 1/4 + x *1 =3,75
x * (1/4 + 1) = 3,75
x * 5/4 = 3,75
x = 3,75 : 5/4
x= 3
x:4+x=3,75
x*1/4+x=3,75
x*5/4=3,75
x=3
Vậy x=3
Nhớ k cho mình nhé
\(x\div4+x=3,75\)
\(\Leftrightarrow\frac{x}{4}+x=3,75\)
\(\Leftrightarrow x\left(\frac{1}{4}+1\right)=3,75\)
\(\Leftrightarrow x\left(\frac{1}{4}+\frac{4}{4}\right)=3,75\)
\(\Leftrightarrow\frac{5}{4}x=3,75\)
\(\Leftrightarrow x=3,75\div\frac{5}{4}\)
\(\Leftrightarrow x=3,75\times\frac{4}{5}\)
\(\Leftrightarrow x=3\)