85 : X = 9 (dư 4)
x =
x =
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
64:x=21 dư 1
(64-1):x=21
63:x=21
x=3
tiếp:
x:6=7 dư 3
(x-3):6=7
x-3=42
x=45
còn lại tương tự
a) \(\dfrac{25}{37}\times\dfrac{18}{29}+\dfrac{18}{29}\times\dfrac{12}{37}\)
\(=\dfrac{18}{29}\times\left(\dfrac{25}{37}+\dfrac{12}{37}\right)\)
\(=\dfrac{18}{29}\times\dfrac{37}{37}\)
\(=\dfrac{18}{29}\times1\)
\(=\dfrac{18}{29}\)
b) \(\dfrac{31}{85}\times\dfrac{11}{19}+\dfrac{31}{85}\times\dfrac{12}{19}-\dfrac{42}{19}\times\dfrac{31}{85}\)
\(=\dfrac{31}{85}\times\left(\dfrac{11}{19}+\dfrac{12}{19}-\dfrac{42}{19}\right)\)
\(=\dfrac{31}{85}\times\dfrac{-19}{19}\)
\(=\dfrac{31}{85}\times-1\)
\(=-\dfrac{31}{85}\)
c) \(\dfrac{16}{53}:\dfrac{17}{9}-\dfrac{16}{53}:\dfrac{17}{8}\)
\(=\dfrac{16}{53}:\left(\dfrac{9}{17}-\dfrac{8}{17}\right)\)
\(=\dfrac{16}{53}:\dfrac{1}{17}\)
\(=\dfrac{16}{901}\)
c) \(\dfrac{1}{5}\times\dfrac{12}{31}\times\dfrac{4}{3}+\dfrac{19}{31}\times\dfrac{4}{15}\)
\(=\dfrac{4}{15}\times\dfrac{12}{31}+\dfrac{19}{31}\times\dfrac{4}{15}\)
\(=\dfrac{4}{15}\times\left(\dfrac{12}{31}+\dfrac{19}{31}\right)\)
\(=\dfrac{4}{15}\times\dfrac{31}{31}\)
\(=\dfrac{4}{15}\times1\)
\(=\dfrac{4}{15}\)
a: =18/29*(25/37+12/37)
=18/29
b: =31/85(11/19+12/19-42/19)
=-31/85
c; =16/53(9/17+8/17)=16/53
d: =4/15(12/31+19/31)=4/15
x + 30 = 10 x 85 + 85 x 9
x + 30 = 1615
x = 1615 - 30
x = 1585
x+30=10x85+9×85
x+30=85×(10+9)
x+30=85×19
x+30=1615
x=1615-30
x=1585
x : 105 = 323 ( dư 85 )
x = 323 . 105 + 85
x = 34 000
Vậy x = 34 000
x + 32 x 327 = 17985
=> x + 10464 = 17985
=> x = 17985 - 10464
=> x =7521
x + 32 x 327 = 17985
x + 32 = 17985 : 327
x + 32 = 55
x = 55 - 32
x = 23
x :105 = 323 ( dư 85 )
x = ( 323 - 85 ) x 105
x = 24990
15126 : x = 438 ( dư 234 )
x = ( 15126 - 234 ) : 438
x = 14892 : 438
x = 34
a) \(x.3,9+x.0,1=2,7\)
x . (3,9+0,1) = 2,7
x . 4 = 2,7
x = 2,7 : 4
x = 0,675
b) x.3 + x.5 = 9,84
x . ( 3+5) = 9,84
x . 8 = 9,84
x = 9,84 : 8
x = 1,23
c) 12,3:x - 4,5:x = 15
(12,3-4,5) : x = 15
7,8 : x = 15
x = 7,8 : 15
x = 0,52
d) 7.x - 2.x = 1,85
(7-2) . x = 1,85
5 . x = 1,85
x = 1,85 : 5
x = 0,37
85:x=9(dư 4)
(85-4):x=9
81:x=9
x=81:9
x=9
x = ( 85 - 4 ) : 9
x = 81 : 9
x = 9
Vậy x = 9