Bài 3: Tìm x
x + 65,27 = 72,6 | x – 43,502 = 21,73 | x x 6,3 = 187 | 1602 : x = 7,2 |
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a/ x+65,27=72,6
x=72,6-65,27
x=7,33
b/x-43,502=21,73
x=21,73+43,502
x=65,232
c/x.6,3=187
x=187:6,3
x=29,682....
d/ 1602:x=7,2
x=1602:7,2
x=222,5
\(X+65,27=72,6\\ X=72,6-65,27=7,33\\ ---\\ X-43,502=21,73\\ X=21,73+43,502=65,232\\ ---\\ X.6,3=187\\ X=\dfrac{187}{6,3}=\dfrac{1870}{63}\\ ---\\ 1602:X=7,2\\ X=1602:7,2=222,5\)
x+ 65,27=72,6
x = 72,6 - 65,27
x = 7,33
x-43,502=21,73
x = 21,73 + 43,502
x = 65,232
a) x + 65,27 = 72,6
=> x = 72,6 - 65,27
=> x = 7,33
b) x * 6,3 = 187
=> x = 187 : 6,3
=> x = 187/6,3
c) 1602 : x = 7,2
=> x = 1602 : 7,2
=> x = 222,5
x(100%+20%)=7.2
x120%=720%
x=720%:120%
x=6
vậy////////
(40%+100%)x+20%=720%
140%x=720%-20%
140%x=700%
x=720%:140%
x=36/7
vậy x=/////////////
x+20%*x=7,2
x(20%+1)=7,2
x(1/5+1)=7,2
x*6/5=7,2
x*1,2=7,2
x=7,2:1,2
x=6
x+20%*x=7,2
x(20%+1)=7,2
x(1/5+1)=7,2
x*6/5=7,2
x*1,2=7,2
x=7,2:1,2
x=6
Bài 1:
a) \(\dfrac{9}{20}-\dfrac{8}{15}\times\dfrac{5}{12}\)
\(=\dfrac{9}{20}-\dfrac{2}{9}\)
\(=\dfrac{41}{180}\)
b) \(\dfrac{2}{3}\div\dfrac{4}{5}\div\dfrac{7}{12}\)
\(=\dfrac{2}{3}\times\dfrac{5}{4}\times\dfrac{12}{7}\)
\(=\dfrac{5}{6}\times\dfrac{12}{7}\)
\(=\dfrac{10}{7}\)
c) \(\dfrac{7}{9}\times\dfrac{1}{3}+\dfrac{7}{9}\times\dfrac{2}{3}\)
\(=\dfrac{7}{9}\times\left(\dfrac{1}{3}+\dfrac{2}{3}\right)\)
\(=\dfrac{7}{9}\times1\)
\(=\dfrac{7}{9}\)
Bài 2:
a) \(2\times\left(x-1\right)=4026\)
\(\left(x-1\right)=4026\div2\)
\(x-1=2013\)
\(x=2014\)
Vậy: \(x=2014\)
b) \(x\times3,7+6,3\times x=320\)
\(x\times\left(3,7+6,3\right)=320\)
\(x\times10=320\)
\(x=320\div10\)
\(x=32\)
Vậy: \(x=32\)
c) \(0,25\times3< 3< 1,02\)
\(\Leftrightarrow0,75< 3< 1,02\) ( S )
=> \(0,75< 1,02< 3\)
\(x+20\%\cdot x=7,2\)
\(x\cdot1+20\%\cdot x=7,2\)
\(x\cdot\left(1+20\%\right)=7,2\)
\(x\cdot\left(1,2\right)=7,2\)
\(x=7,2:1,2\)
\(x=6\)
a,\(\Rightarrow x:3=1,56+7,2\)
\(\Rightarrow x:3=8,76\)
\(\Rightarrow x=8,76\cdot3\)
\(\Rightarrow x=26,28\)
b,\(\Rightarrow x:6=1,248:4\)
\(\Rightarrow x:6=0,312\)
\(\Rightarrow x=0,312\cdot6\)
\(\Rightarrow x=1,872\)
c,(x+x+x+x+...+x)+(2+5+8+....+29)=165
10 số hạng 10 số hạng
\(\Rightarrow\)10x+(29+2)*10:2=165
\(\Rightarrow\)10x+155=165
\(\Rightarrow10x=165-155\)
\(\Rightarrow10x=10\)
\(\Rightarrow x=10:10\)
\(\Rightarrow x=1\)
\(x+65,27=72,6\)
\(x=72,6-65,27\)
\(x=7,33\)
-------------------------------------
\(x-43,502=21,73\)
\(x=21,73+43,502\)
\(x=65,232\)
-------------------------------------
\(x\times6,3=187\)
\(x=187:6,3\)
\(x=\dfrac{1870}{63}\)
--------------------------------------
\(1602:x=7,2\)
\(x=1602:7,2\)
\(x=222,5\)