Theo ĐLBTL điện tích:
\(0,25.2+3x=0,1.1+2y\\ \Leftrightarrow2y-3x=0,4\left(1\right)\\ Mà:m_{rắn}=72,95\left(g\right)\\ \Leftrightarrow0,25.64+27x+96y+35,5.0,1=72,95\\ \Leftrightarrow27x+96y=53,4\left(2\right)\\ \left(1\right),\left(2\right)\Rightarrow\left\{{}\begin{matrix}27x+96y=53,4\\2y-3x=0,4\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,2\\y=0,5\end{matrix}\right.\)