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Ta có: \(\left(327x+2^4\right)\cdot7^3=7\cdot7^5\)
\(\Leftrightarrow\left(327x+16\right)\cdot7^3=7^6\)
\(\Leftrightarrow327x+16=7^3\)
\(\Leftrightarrow327x+16=343\)
\(\Leftrightarrow327x=327\)
\(\Rightarrow x=1\)
(327.x + 24).73 = 7.75
=> (327.x + 24) = \(\frac{7\cdot7^5}{7^3}=7^3\)
=> 327.x + 24 = 73
=> 327.x = 73 - 24
=> 327.x = 327
=> x = 1
a)1440:40 =36
b)205 x 13 =2665
c)2057
d)36 x 25 x 4 =3600
18 x 24 :9 =48
41 x 2 x 8 x 5 =3280
215 x 86 + 215 x 14 =21500
53 x 128 - 43 x 128 =1408
2/3 x 4/7 =8/21
2 x 3 x 4 / 2 x 3 x 4 x 5 =24/120
1 x 2 x 3 x 4 / 5 x 6 x 7 x 8=24/1680
x : 7/11 = 22
x =22 x 7/11
x =14
2/7 * x =2/3
x = 2/7 :2/3
x = 20/21
b1
day chu hanoihanoi co 10 chu cai
ta co: 2016:10=201(du 6)
vay chu cai thu 2016 la chu H
(3x+26).54= 7.58
3x+64 = 7.58:54
3x+64 = 4375
3x = 4311
x = 1437
Vậy x=1437
Học tốt nha^^
a) \(x+215=480\)
\(x=480-215\)
\(x=265\)
b) \(725-x=185:5\)
\(725-x=37\)
\(x=725-37\)
\(x=688\)
c) \(x\times\dfrac{1}{3}+x\times\dfrac{4}{3}=\dfrac{2}{3}\)
\(x\times\left(\dfrac{1}{3}+\dfrac{4}{3}\right)=\dfrac{2}{3}\)
\(x\times\dfrac{5}{3}=\dfrac{2}{3}\)
\(x=\dfrac{2}{3}:\dfrac{5}{3}=\dfrac{2}{3}\times\dfrac{3}{5}\)
\(x=\dfrac{2}{5}\)
d) \(\left(\dfrac{13}{5}+\dfrac{2}{3}\right):x=5\)
\(\dfrac{49}{15}:x=5\)
\(x=\dfrac{49}{15}:5=\dfrac{49}{15}\times\dfrac{1}{5}\)
\(x=\dfrac{49}{75}\)
a)x + 215 = 480
x = 480 - 215
x = 265
b) 725 - x = 185 : 5
725 - x = 37
x = 725 - 37
x = 688
Bài làm:
Ta có: \(\left(593x+2^6\right).5^4=2.5^8\)
\(\Leftrightarrow593x+64=2.5^4=1250\)
\(\Leftrightarrow593x=1186\)
\(\Rightarrow x=2\)