The application of Gaussian elimination matrix resulted in incorrect single terms

[Sife-shuo]

The simple problem recurrence code is as follows

var a=new Chemistry.Equation("CH3CHO+Cu(OH)2+NaOH=CH3COONa+CuO2+H2O");
console.log(a+"");
console.log(a.trim());
console.log(a+"");
console.log(a)

Balancing this equation will fail because the last term in the triangular form has only one valid value