-8 (8 -x) = 4/5 (x+10)
\(-8\times(8-x)=\frac{4}{5}\times(x+10)\)
\(-64+8x=\frac{4}{5}\times(x+10)\)
\(-64+8x=\frac{4}{5}x+\frac{40}{5}\)
\(-64+8x=\frac{4}{5}x+8\)
\(8x=\frac{4}{5}x+72\)
\(\frac{36}{5}x=72\)
\(x=\frac{360}{36}\)
\(x=10\)