\(\frac{x-3}{x+5}=\frac{5}{7}\)
\(\Rightarrow\left(x-3\right).7=\left(x+5\right).5\)
\(\Rightarrow7x-21=5x+25\)
\(\Rightarrow7x-5x=21+25\)
\(\Rightarrow2x=46\)
\(\Rightarrow x=46:2\)
\(\Rightarrow x=23\)
\(\frac{x-3}{x+5}=\frac{5}{7}\)
\(\Leftrightarrow\left(x-3\right)7=\left(x+5\right)5\)
\(\Leftrightarrow7x-21=5x+25\)
\(\Leftrightarrow2x=46\)
\(\Leftrightarrow x=23\)
\(\frac{x-3}{x+5}=\frac{5}{7}\)
\(\Leftrightarrow\left(x-3\right).7=5.\left(x+5\right)\)
\(\Rightarrow7x-7.3=5x+5.5\)
\(\Rightarrow7x-21=5x-25\)
\(\Rightarrow7x-5x=25+21\)
\(\Rightarrow\left(7-5\right).x=46\)
\(\Rightarrow2x=46\)
\(\Rightarrow x=46:2\)
\(\Rightarrow x=23\)
\(\frac{x-3}{x+5}=\frac{5}{7}\)
\(=>\left(x-3\right).7=\left(x+5\right).5\)
\(=>7x-21=5x+25\)
\(=>\)\(7x-5x=21+25\)
\(=>2x=46\)
\(=>46:2\)
\(=>x=23\)
\(\frac{x-3}{x+5}=\frac{3}{7}\left(ĐK:x\ne-5\right)\)
\(\Leftrightarrow3\left(x+5\right)=7\left(x-3\right)\)
\(\Leftrightarrow3x+15=7x-21\)
\(\Leftrightarrow-4x=-36\)
\(\Leftrightarrow x=9\)
