( 27 . x + 6 x ) : 3 - 11 = 9
3(1/11) x 27(27/46) x 1(6/17) x 2(4/9)=
Tính nhanh: LƯU Ý tất cả số dưới đây đều là phân số
1,1/8 x 2/5 + 3/5 + 1/8
2,( -1)/15 x 2/5 + (-5)/3 x (-1)/13
3,4/9 : 11/6 + 5/9 x 6/11
4,5/19 x 7/13 + 7/19 x 8/13 - 3 x 7/19
5, 2/7 x 4/23 - 2/7 x 27/23 + 2/7
6,3/8 x 3/7 +3/8 x 4/7 + 11/8
7,-5/27 : 6/11 - 16/11 x 5/27 - 5/27
8, 5/16 x 7/8 - 5/16 x 1/8 + 10/8 :16/5
9,1/3 x 39/17 - 129/3 x 1/17
10,5/2 : 23/3 - 3/2 x 7/23
2: \(=\dfrac{-2}{75}+\dfrac{5}{39}=\dfrac{33}{325}\)
3: \(=\dfrac{6}{11}\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=\dfrac{6}{11}\)
4: \(=\dfrac{7}{19}\left(\dfrac{5}{13}+\dfrac{8}{13}-1\right)=-2\cdot\dfrac{7}{19}=-\dfrac{14}{19}\)
5: \(=\dfrac{2}{7}\left(\dfrac{4}{23}-\dfrac{27}{23}+1\right)=0\)
6: \(=\dfrac{3}{8}\left(\dfrac{3}{7}+\dfrac{4}{7}\right)+\dfrac{11}{8}=\dfrac{3}{8}+\dfrac{11}{8}=\dfrac{14}{8}=\dfrac{7}{4}\)
(27.x+6):3-11=9
(27x+6)÷3-11=9
=> (27x+6)÷3=20
=> 27x + 6 = 60
=> 27x = 54
=> x = 2
(27.x + 6) : 3 - 11 = 9
(27x + 6) : 3 = 9 + 11
(27x + 6) : 3 = 20
27x + 6 = 20 . 3
27x + 6 = 60
27x = 60 - 6
27x = 54
x = 54 : 27
x = 2
(27 . x + 6) : 3 - 11 = 9????:)
(27.x + 6) : 3 - 11 = 9
(27.x + 6) : 3 = 9 + 11
(27.x + 6) : 3 = 20
27.x + 6 = 20.3
27.x + 6 = 60
27.x = 60 - 6
27.x = 54
x = 54 : 27
x = 2
{(-5/7)-7/9+9/11-11/13}x(3-3/4)
(10/21+14/27-6/11+22/39):(2-2/3)
( 27*x +6 ) :3 -11 = 9
( 27x + 6) : 3 - 11 = 9
( 27x + 6) : 3 = 20
27x + 6 = 60
27x = 54
x = 2
(27*x+6):3=9+11=20
27x+6=20 .3=60
27x=60-6=54
x=54:27
x=2
Tính:
a) 2^5 x 13^12 x 7^8 : 27 x 13^10 x 7^9
b) 2^n x 11 x 3 : 6^n x 3
c) 5^5 x 7 x 9^5 : 15^10
d) 7 x 8^10 x 27^9 - 8 x 9^13 x 2^27 : 7 x 6^26 x 2^2 - 2^4 x 8^3 x 27^9
e) 2^2^1^2015
f) 2015^0^2015^0^2015
1. Tính:
3 và 1/11 x 27 và 27/46 x 1 và 6/17 x 2 và 4/9
=88.57596425 nha bn.
( 27. x + 6 ) : 3 - 11 = 9
X = 2
học tốt
\(\left(27x+6\right):3-11=9\)
\(\left(27x+6\right):3=9+11=20\)
\(27x+6=60\)
\(27x=54\)
\(x=2\)
(27x+6):3-11=9
,=> 9x+2=20
=>9x=18
=>x=2
học tốt nha