The elimination and reduction method of Alhualazimi, a mathematician in Central Asia, refers to the elimination of terms in equations in pairs. It is equivalent to "merging similar terms" in modern solving equations. It is equivalent to the "shift term" in solving modern equations, which promotes the progress of ancient mathematics and provides a simple method for people to solve equation problems. Conversion is to transform the equation into a form in which all terms on the left contain unknowns and none on the right contain unknowns. It is equivalent to the "shift term" in modern solving equations. Elimination, as the name implies, is to eliminate the items in the equation in pairs. It is equivalent to "merging similar terms" in modern solving equations.