A shop sells bananas and pears.  Max buys $1$ banana and $2$ pears. He paid $94$p.  Emily buys $1$ banana and $1$ pear. She paid $62$p.  How much does $1$ banana cost? 
Overseas Competition->Knowledge Point->Word Problem Modules->Equation Word Problems->Multivariate Linear Equation Word Problems->Solving Problems by Solving System of 
Binary Linear Equations with Integer Coefficients 