tìm x
x x 11 = 33/20
5 : x = 4/7
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\(x\times\dfrac{11}{8}=\dfrac{33}{20}\)
\(x=\dfrac{33}{20}:\dfrac{11}{8}\)
\(x=\dfrac{33}{20}\times\dfrac{8}{11}\)
\(x=\dfrac{6}{5}\)
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\(5:x=\dfrac{4}{7}\)
\(x=5:\dfrac{4}{7}\)
\(x=5\times\dfrac{7}{4}\)
\(x=\dfrac{35}{4}\)
Chúc bạn học tốt
a: \(\Leftrightarrow x=\dfrac{33}{20}:\dfrac{11}{8}=\dfrac{33}{20}\cdot\dfrac{8}{11}=3\cdot\dfrac{2}{5}=\dfrac{6}{5}\)
b: \(\Leftrightarrow x=5:\dfrac{4}{7}=\dfrac{35}{4}\)
a) =(7/11+4/11)+(3/4+1/4) b)=>4/5x=12 c)=>x-6/10=1/10 d)tự làm e)=>4/x=4/20 f)=>198/33+x/33=21/33
=1+1 x=12.5/4 x=1/10+6/10 =>x=20 =>x=21-198
=2 x=15 x=7/10 =>x=-177
11: Ta có: \(\left(x+3\right)^3=125\)
\(\Leftrightarrow x+3=5\)
hay x=2
12: Ta có: \(\left(2x\right)^4=16\)
\(\Leftrightarrow x^4=1\)
hay \(x\in\left\{1;-1\right\}\)
1. 11(x-9)=77
x-9=7
x=16
2. 4(x-3)=48
x-3=12
x=15
3.3(x-8)=81
(x-8)=27
x=35
\(\frac{22}{25}\times\frac{5}{11}-\frac{33}{25}:\frac{11}{5}+\frac{58}{11}\)
\(=\frac{22}{25}\times\frac{5}{11}-\frac{33}{25}\times\frac{5}{11}+\frac{58}{11}\)
\(=\frac{5}{11}\times\left(\frac{22}{25}+\frac{33}{25}\right)+\frac{58}{11}\)
\(=\frac{5}{11}\times\frac{11}{5}+\frac{58}{11}\)
\(=1+\frac{58}{11}\)
\(=\frac{11}{11}+\frac{58}{11}\)
\(=\frac{69}{11}\)
\(8\frac{3}{11}-\left(3\frac{5}{7}-7\frac{8}{11}\right)\)
\(=\frac{91}{11}-\left(\frac{26}{7}-\frac{85}{11}\right)\)
\(=\frac{91}{11}-\frac{26}{7}+\frac{85}{11}\)
\(=\frac{91}{11}+\frac{85}{11}-\frac{26}{7}\)
\(=16-\frac{26}{7}\)
\(=\frac{86}{7}\)
\(\frac{5}{6}x+325\%=\frac{3}{2}x-30,75\)
\(=>\frac{5}{6}x+3,25=\frac{3}{2}x-30,75\)
\(=>\frac{5}{6}x-\frac{3}{2}x=-30,75-3,25\)
\(=>\frac{-2}{3}x=-34\)
\(=>x=-34:\left(-\frac{2}{3}\right)\)
\(=>x=-34.\left(\frac{3}{-2}\right)\)
\(=>x=51\)
\(x\times11=\dfrac{33}{20}\)
\(x=\dfrac{33}{20}:11\)
\(x=\dfrac{3}{20}\)
\(5:x=\dfrac{4}{7}\)
\(x=5:\dfrac{4}{7}\)
\(x=\dfrac{35}{4}\)
`x xx 11 = 33 / 20`
`x = 33 / 20 : 11`
`x = 33 / 20 . 1 / 11`
`x = 3 / 20` Vậy `x = 3 / 20`
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`5 : x = 4 / 7`
`x = 5 : 4 / 7`
`x = 5 . 7 / 4`
`x = 35 / 4` Vậy `x = 35 / 4`