From the given condition,
\[10×2\text{ }\text{ }60x\text{ }+\text{ }80\text{ }=\text{ }6×2\text{ }\text{ }30x\text{ }+\text{ }30\]
\[4×2\text{ }\text{ }30x\text{ }+\text{ }50\text{ }=\text{ }0\]
\[2×2\text{ }\text{ }15x\text{ }+\text{ }25\text{ }=\text{ }0\]
Here, \[a\text{ }=\text{ }2,\text{ }b\text{ }=\text{ }-\text{ }15\text{ }and\text{ }c\text{ }=\text{ }25\]
Hence, \[x\text{ }=\text{ }5\] or \[x\text{ }=\text{ }5/2\]