Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\dfrac{3}{4}:x+\dfrac{1}{2}:\dfrac{1}{4}=4\)
\(\Rightarrow\dfrac{3}{4}:x+2=4\)
\(\Rightarrow\dfrac{3}{4}:x=2\Rightarrow x=\dfrac{3}{8}\)
\(\dfrac{3}{4}:x+\dfrac{1}{2}:\dfrac{1}{4}=4\)
\(\Leftrightarrow\dfrac{3}{4}:x=2\)
hay \(x=\dfrac{3}{8}\)
\(\dfrac{22}{5}\times\dfrac{6}{121}\times\dfrac{11}{4}\times\dfrac{3}{5}\times\dfrac{1}{3}\times\dfrac{5}{4}\)
\(=\left(\dfrac{22}{5}\times\dfrac{5}{4}\right)\times\left(\dfrac{6}{121}\times\dfrac{11}{4}\right)\times\left(\dfrac{3}{5}\times\dfrac{1}{3}\right)\)
\(=\dfrac{11}{2}\times\dfrac{3}{22}\times\dfrac{1}{5}\)
\(=\dfrac{3}{20}\)
\(=\dfrac{22\times6\times11\times3\times1\times5}{5\times121\times4\times5\times3\times4}=\dfrac{11\times2\times6\times11\times1}{11\times11\times4\times5\times4}=\dfrac{2\times6\times1}{4\times5\times4}=\dfrac{18}{100}=\dfrac{9}{50}\)
(4X+5) : 3 - 121 : 11 = 4
(4X+5) : 3 - 11 = 4
(4X+5) : 3 = 4 + 11 = 15
(4X+5) = 15 * 3 = 45
4X = 45 - 5 = 40
X = 40 : 4 = 10
Ta có: {4x+5}:3-121:11=4
{4x+5} :3- 11=4
{4x+5}:3=15
4x+5=45
4x=40
x=10
Vậy x=10.
a, 3/4 ÷ x/6 = 0,75
x/6 = 0,75 ÷ 0,75
x/6 = 1
=> x = 6
Vậy x = 6
b, 2,5 . 45/ x = 5/6
45/x = 5/6 ÷ 2,5
45/x = 1/3
=> x = 45 × 3
=> x = 135
Vậy x = 135
c, x/12 + 121,5 = 121,5
x/12 = 121,5 - 121,5
x/12 = 0
=> x = 0
Vậy x = 0
e, 6/8 = 15/x
3/4 = 15/x
=> x = 20
Vậy x = 20
Bài 2:
a, \(\dfrac{5}{23}\) \(\times\) \(\dfrac{17}{26}\) + \(\dfrac{5}{23}\) \(\times\) \(\dfrac{9}{26}\)
= \(\dfrac{5}{23}\) \(\times\) ( \(\dfrac{17}{26}\) + \(\dfrac{9}{26}\))
= \(\dfrac{5}{23}\) \(\times\) \(\dfrac{26}{26}\)
= \(\dfrac{5}{23}\)
b, \(\dfrac{3}{4}\) \(\times\) \(\dfrac{7}{9}\) + \(\dfrac{7}{4}\) \(\times\) \(\dfrac{3}{9}\)
= \(\dfrac{7}{12}\) + \(\dfrac{7}{12}\)
= \(\dfrac{14}{12}\)
= \(\dfrac{7}{6}\)
121 :x =11
x=121:11
x=11
20+x=300+60
20+x=360
x=360-20
x=340
25x10-3
=250-3
=247
121 : x = 11
x = 121 : 11
x = 11
20 + x = 300 + 60
20 + x = 360
x = 360 - 20
x = 340
25 x 10 - 3 = 250 - 3
= 247
= 65 x ( 121 + 11) - 35 x ( 17 + 115 )
= 65 x 132 - 35 x 132
= ( 65 - 35) x 132
= 30 x 132
= 3960
(4.x):3-121:11=4
(4.x):3-11=4
(4.x):3=4+11
(4.x):3=15
4x=15:3
4x=5
x=\(\frac{5}{4}\)
\(=>\left(4.x\right):3-11=4\)
\(=>\left(4.x\right):3=4+11=15\)
\(=>4.x=15.3=45\)
\(=>x=\frac{45}{4}=11.25\)