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a)
151 - 2 x ( x-6 ) = 2227 : 17
2 x ( x-6 ) = 131
2 x ( x-6 ) = 151 - 131
2 x ( x-6 ) = 20
x-6 = 20 : 2
x - 6 = 10
x = 10 + 6
x = 16
b)
\(\dfrac{2}{3}-\dfrac{1}{4}=\dfrac{5}{12}\\ X=\dfrac{5}{12}:\dfrac{1}{3}=\dfrac{5}{4}\)
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a) \(x+2\frac{1}{6}=3\frac{1}{3}\)
\(x+\frac{13}{6}=\frac{10}{3}\)
\(x=\frac{10}{3}-\frac{13}{6}=\frac{7}{6}\)
b) \(x-2\frac{3}{7}=3\)
\(x-\frac{17}{7}=3\)
\(x=3+\frac{17}{7}=\frac{38}{7}\)
c) \(x.1\frac{1}{3}=2\frac{2}{3}\)(dấu chấm là dấu nhân)
\(x.\frac{4}{3}=\frac{8}{3}\)
\(x=\frac{8}{3}:\frac{4}{3}=2\)
(Nhớ k cho mình với nhé!)
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a,3/5 * X = 5/6
X = 5/6 : 3\5
X = 25 /18
b, X = 5/3 - 1/2
X = 7/6
a) \(\frac{3}{5}\) x X = \(\frac{1}{6}\) + \(\frac{2}{3}\)
\(\frac{3}{5}\) x X = \(\frac{5}{6}\)
X = \(\frac{5}{6}\) : \(\frac{3}{5}\) ( Tìm thừa số)
X = \(\frac{25}{18}\)
b) \(\frac{5}{3}\) - X = \(\frac{1}{2}\)
X = \(\frac{5}{3}\) - \(\frac{1}{2}\)( Tím số trừ)
X = \(\frac{7}{6}\)
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11 x 10 - 10 x 9 + 9 x 8 - 8 x 7 + 7 x 6 - 6 x 5 + 5 x 4 - 4 x 3 + 3 x 2 - 2 x 1 = 60
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\(\dfrac{1}{2}:3+x=1\dfrac{2}{3}\\ \Leftrightarrow x=\dfrac{5}{3}-\dfrac{1}{6}\\ \Leftrightarrow x=\dfrac{3}{2}\\2\dfrac{3}{4}-x=\dfrac{5}{6}+\dfrac{2}{3}\\ \Leftrightarrow x=\dfrac{11}{4}-\dfrac{5}{6}-\dfrac{2}{3} \\ \Leftrightarrow x=\dfrac{5}{4}\\ 5\dfrac{4}{10}-\dfrac{3}{4}\times x=\dfrac{2}{3}\\ \Leftrightarrow\dfrac{3}{4}x=\dfrac{54}{10}-\dfrac{2}{3}\\ \Leftrightarrow x=\dfrac{284}{45}\)
1) ....
1/2 : 3 = 5/3 - x
1/6 = 5/3 - x
x = 5/3 - 1/6 =3/2
2)....
11/4 - x = 3/2
x = 11/4 - 3/2 =5/4
3)...
27/5 - 3/4x = 2/3
3/4x = 27/5 - 2/3 =71/15
x = 71/15 : 3/4 =284/45
(x - 2) : 2 x 3 = 6
(x-2) :2 =6:3
(x-2) :2 =2
(x-2) =2x2
x-2 =4
x =4+2
x =6
( x -2 ) : 2 x 3 = 6
⇔ ( x - 2 ) : 2 = 6 : 3
⇔ ( x - 2 ) : 2 = 2
⇔ ( x - 2 ) = 2 x 2
⇔ x - 2 = 4
⇔ x = 4 - 2
⇔ x = 2
Vậy x = 2