\(\frac{5x+15}{275}=\frac{4}{35}\)
\(\Rightarrow35\times\left(5x+15\right)=275\times4\)
\(\Rightarrow35\times\left(5x+15\right)=1100\)
\(\Rightarrow5x+15=1100:35\)
\(\Rightarrow5x+15=\frac{220}{7}\)
\(\Rightarrow5x=\frac{220}{7}-15\)
\(\Rightarrow5x=\frac{115}{7}\)
\(\Rightarrow x=\frac{115}{7}:5\)
\(\Rightarrow x=\frac{23}{7}\)
\(\frac{5\times+15}{275}=\frac{4}{35}\)
\(\Rightarrow\frac{5\times+15}{4}=\frac{275}{35}\)
\(\Rightarrow\frac{5\left(\times+3\right)}{4}=\frac{55}{7}\)
\(\Rightarrow35\left(\times+3\right)=210\)
\(\Rightarrow\times+3=6\)
\(\Rightarrow\times=3\)
\(\frac{5x+15}{275}=\frac{4}{35}\)
\(\Rightarrow\text{ }35\left(5x+15\right)=4\cdot275\)
\(35\left[5\left(x+3\right)\right]=1100\)
\(175\left(x+3\right)=1100\)
\(x+3=\frac{1100}{175}\)
\(x+3=\frac{44}{7}\)
\(x=\frac{44}{7}-3\)
\(x=\frac{23}{7}\)
\(\frac{5x+15}{275}=\frac{4}{35}\)
\(\frac{5x+15}{4}=\frac{275}{35}\)
\(\frac{5\left(x+3\right)}{4}=\frac{55}{7}\)
\(35\left(x+3\right)=210\)
\(x+3=6\)
\(x=3\)
