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15,39 - 14,96 : ( 40 x 0,04 )
= 15,39 - 14,96 : 1,6
= 15,39 - 9,35
= 6,04
15.39-14.96:[40x0.04]
=15.39-14.96:1.6
=15.39-9.35
=6.04
![](https://rs.olm.vn/images/avt/0.png?1311)
0,8 x X = 1,2 x 10 210 : x = 14,92 - 6,52
0,8 x X = 12 210 : x = 8,4
X = 12 : 0,8 x = 210 : 8,4
X = 15 x = 25
![](https://rs.olm.vn/images/avt/0.png?1311)
\(0,8\times x=90-40,6\)
\(\Rightarrow0,8\times x=49,4\)
\(\Rightarrow x=49,4:0,8\)
\(\Rightarrow x=61,75\)
\(210:x=14,92-6,52\)
\(\Rightarrow210:x=8,4\)
\(\Rightarrow x=210:8,4\)
\(\Rightarrow x=25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(210\div x=14,92-6,52\)
\(210\div x=8,4\)
\(\Rightarrow x=210\div8,4\)
\(\Rightarrow x=25\)
\(\frac{210}{x}\)= 14,92 - 6,52
\(\frac{210}{x}\)= 8,4
210 : x = 8,4
x = 210 : 8,4
x = 25
Nhớ k mk nha !!!!!!!!!!!!!!!!!!!!!!!!!!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
3 x ( 36,2 - 6,52 ) + 7 x 36,2 + 3 x 0,52
= 36,2 x ( 3 + 7 ) + ( 6,52 - 0,52 ) + 3 + 1
= 36,2 x 10 + 6 + 3 + 1
= 362 + 6 + 3 +1
= 372
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 25 : x = 16 : 10
25 : x = 1,6
x = 25: 1,6
x = 15,625
b) 210 : x = 14,92 - 6,52
210 : x = 8,4
x = 210 : 8,4
x = 25
210 : x = 14,92 - 6,52
210 : x = 8,4
x = 210 : 8,4
x = 25
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{25}{x}=\frac{16}{10}\)
\(\frac{25}{x}=\frac{8}{5}\)
\(x=\frac{25.5}{8}=\frac{125}{8}\)
\(\frac{210}{x}=8,4\)
\(\frac{210}{x}=\frac{42}{5}\)
\(x=\frac{210.5}{42}=25\)
211:x+6,52=14,96
211:x=8,44
x=25
221:x=14,96-6,52
221:x=8.44
x=8,44x221
x=1865,24