1/2x + 3/5(x-2) = 3
\(\frac{1}{2}x+\frac{3}{5}x-\frac{6}{5}=3\)
\(\frac{11}{10}x=\frac{21}{5}\)
\(x=\frac{21}{5}:\frac{11}{10}\)
\(x=\frac{42}{11}\)
#mã mã#
1/2x + 3/5x - 6/5 = 3
x(1/2 + 3/5) = 3 + 6/5
11/10x = 21/5
x = 21/5 : 11/10
x = 42/11
\(\frac{1}{2}x+\frac{3}{5}\left(x-2\right)=3\)
\(\Rightarrow\frac{1}{2}x+\frac{3}{5}x-\frac{6}{5}=3\)
\(\Rightarrow x\left(\frac{1}{2}+\frac{3}{5}\right)-\frac{6}{5}=3\)
\(\Rightarrow x\left(\frac{1}{2}+\frac{3}{5}\right)=\frac{21}{5}\)
\(\Rightarrow\frac{11}{10}x=\frac{21}{5}\Rightarrow x=\frac{21}{5}\div\frac{11}{10}=\frac{42}{11}\)
Vậy \(x=\frac{42}{11}\)
\(\frac{1}{2}\times x+\frac{3}{5}\times\left(x-2\right)=3\)
\(\Rightarrow\frac{1}{2}\times x+\frac{3}{5}\times x-\frac{3}{5}\times2\)\(=3\)
\(\Rightarrow x\times\left(\frac{1}{2}+\frac{3}{5}\right)-\frac{6}{5}=3\)
\(\Rightarrow x\times\left(\frac{5}{10}+\frac{6}{10}\right)=3+\frac{6}{5}\)
\(\Rightarrow x\times\frac{11}{10}=\frac{15}{5}+\frac{6}{5}\)
\(\Rightarrow x\times\frac{11}{10}=\frac{21}{5}\)
\(\Rightarrow x=\frac{21}{5}:\frac{11}{10}=\frac{21}{5}\times\frac{10}{11}\)
\(\Rightarrow\frac{42}{11}\)
