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![](https://rs.olm.vn/images/avt/0.png?1311)
287-x:27=2015 45x(463+x)=44955
x:27=2015+287 463+x =44955:45
x:27=2302 463+x =999
x = 2302x27 x =999-463
x = 62154 x =536
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1 :
\(\frac{2087-x}{27}=2015\)
\(2087-x=2015.27\)
\(2087-x=54405\)
\(x=2087-54405\)
\(x=-52318\)
B2 :
45(463+x)=44955
463+x=44955:45
463+x=999
x=999-463
x=536
Bài 1 :
$\frac{2087-x}{27}=2015$2087−x27 =2015
$2087-x=2015.27$2087−x=2015.27
$2087-x=54405$2087−x=54405
$x=2087-54405$x=2087−54405
$x=-52318$x=−52318
B2 :
45(463+x)=44955
463+x=44955:45
463+x=999
x=999-463
x=536
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
2087 - x : 27 = 2015
x : 27 = 2087 - 2015
x : 27 = 72
x = 72 x 27
x = 1944
45 x (463 + x) = 44955
463 + x = 44955 : 45
463 + x = 999
x = 999 - 463
x = 536
#hok tốt#
![](https://rs.olm.vn/images/avt/0.png?1311)
2087 - x :27 = 2015
x : 27 = 2087 - 2015
x : 27 = 72
x = 72 x 27
x = 1944
2087 - x : 27 = 2015
x : 27 = 2087 - 2015
x : 27 = 72
x =72 x 27
x =1944
45 x ( 463 + x ) = 44955
463 + x = 44955 : 45
463 + x = 999
x = 999 - 463
x = 536
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: 45 x (463 + x ) = 44955
463 + x = 44955 : 45
463 + x = 999
x = 999 - 463
x = 536
![](https://rs.olm.vn/images/avt/0.png?1311)
2087-\(\frac{x}{27}\)=2015
\(\frac{x}{27}\)=2087-2015
\(\frac{x}{27}\)=72
x=72 . 27
x=1944
đề loại nào thế.
Kiểu 1 :\(2087-\frac{x}{27}=2015\)
Kiểu 2 : \(\frac{2087-x}{27}=2015\)
Kiểu 1 hay kiểu 2 vậy
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(2087-\frac{x}{27}=2015\)
\(\Rightarrow\frac{x}{27}=2087-2015=72\)
\(\Rightarrow\frac{x}{27}=72\)
\(\Rightarrow x=27.72=1944\)
![](https://rs.olm.vn/images/avt/0.png?1311)
=>463+x=44955:45
=>463+x=999
=>x=999-463
=>x=536
dung quen nhe moi nguoi
45 x (463+x) = 44955
=> 463 + x = 44955 : 45
=> 463 + x = 999
=> x = 999 - 463
=> x = 536
Nhìn thấy thì tiếc gì 1 Li.ke nhỉ ???
#Học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
a) 19/27+9/7+6/27+5/7+2/7
= (19/27+6/27) + (9/7+5/7+2/7)
=1 + 16/7
=23/7
b) 2/7 + 27/48 + 7/16 +45/63
= (2/7 + 45/63) + (27/48 +7/16)
= (2/7 + 5/7) + ( 9/16 + 7/16)
= 1 + 1
=2
c) Tính bằng cách bình thường
Bài 2:
6/11 + x = 1
x = 1-6/11
x = 5/11
Bài làm
a) \(\frac{19}{27}+\frac{9}{7}+\frac{6}{27}+\frac{5}{7}+\frac{2}{7}\)
\(=\frac{27}{27}+\frac{16}{7}\)
\(=1+\frac{16}{7}\)
\(=\frac{7}{7}+\frac{16}{7}\)
\(=\frac{23}{7}\)
b) \(\frac{2}{7}+\frac{27}{48}+\frac{7}{16}+\frac{45}{63}\)
\(=\left(\frac{18}{63}+\frac{45}{63}\right)+\left(\frac{27}{48}+\frac{21}{48}\right)\)
\(=\frac{63}{63}+\frac{48}{48}\)
\(=1+1\)
\(=2\)
c) \(\frac{17}{23}+\left(\frac{4}{7}-\frac{6}{13}\right)\)
\(=\frac{17}{23}+\left(\frac{52}{91}-\frac{42}{91}\right)\)
\(=\frac{17}{23}+\frac{10}{91}\)
\(=\frac{1547}{2093}+\frac{230}{2093}\)
\(=\frac{1770}{2093}\)
Bài 2
\(\frac{6}{11}+x=1\)
\(x=1-\frac{6}{11}\)
\(x=\frac{11}{11}-\frac{6}{11}=\frac{5}{11}\)
Vậy \(x=\frac{5}{11}\)
2087 - x : 27 = 2015
x : 27 = 2087 - 2015
x : 27 = 72
x = 72 x 27
x = 1944
b) 45 x (463 + x) = 44955
463 + x = 44955 : 45
463 + x = 999
x = 999 - 463
x = 536
a) 2087-x : 27=2015
x : 27=2087-2015
x : 27=72
x = 72x27
x =1944