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Bài 1: Tìm X, biết:
1) 31,5 . 0,1 + X . 3 = 7,65
2) 3/8 + ( X - 5/24 ) : 2/3 = 1
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. \(31,5.0,1+3x=7,65\)
2. \(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{8}.\frac{2}{3}\)
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. \(\frac{3}{8}+\left(x-\frac{5}{24}\right):\frac{2}{3}=1\)
\(\Leftrightarrow\left(x-\frac{5}{24}\right):\frac{2}{3}=\frac{5}{8}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{8}.\frac{2}{3}\)
\(\Leftrightarrow x-\frac{5}{24}=\frac{5}{12}\)
\(\Leftrightarrow x=\frac{5}{8}\)