a 91,08 : 3,6 = 410 - x
b 7,65 = 31,5 x 0,1 + X x 3
mik cần bài này gấp
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a/ => X. (3,1+6,9)=25
=> X.10=25
=> X=25:10=5/2
b/ X.3 = 7,65-31,5.0,1
=> 3X=4,5
=> X=4,5:3 = 1,5
1) \(31,5\cdot0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
b)\(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)
1. \(31,5.0,1+3x=7,65\)
\(\Leftrightarrow3,15+3x=7,65\)
\(\Leftrightarrow3x=4,5\)
\(\Leftrightarrow x=1,5\)
2. \(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{8}.\frac{2}{3}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)
a) \(x.3,1+x.6,9+5,4=30,4\)
\(x.\left(3,1+6,9\right)+5,4=30,4\)
\(x.10+5,4=30,4\)
\(x.10=30,4-5,4\)
\(x.10=25\)
\(x=25\div10\)
\(x=\frac{5}{2}\)
b) \(31,5.0,1+x.3=7,65\)
\(3,15+x.3=7,65\)
\(a,x\times3,1+x\times6,9+5,4=30,4\)
\(x\times3,1+x\times6,9=30,4+5,4\)
\(x\times3,1+x\times6,9=35,8\)
\(x\times\left(3,1+6,9\right)=35,8\)
\(x\times10=35,8\)
\(x=35,8:10\)
\(x=3,58\)
17,5 : 1,52 = 875/76
72,45 : 3,45 = 21
562,5 : 4,5 = 125
91,08 : 1,8 = 50.6
a: =>410-x=25,3
nên x=384,7
b: =>3x+3,15=7,65
=>3x=4,5
hay x=1,5
\(x=410-\left(91,08:3,6\right)=410-25,3=384,7\)
\(x=\left[7,65:\left(31,5\times0,1\right)\right]:3=\dfrac{17}{21}\)