含有三个相同的未知数,每个方程中含未知数的项的次数都是1次,并且一共有三个方程(有时会有特例,但是所有的三元一次方程组都有3个未知数),这样的方程组叫做三元一次方程组.解三元一次方程组通常通过加减消元法或代人消元法先把三元一次方程组转化为二元一次方程组,进而再解出二元一次方程组,然 Contains three identical unknowns, the number of unknowns in each equation is one, and there are three equations in total (sometimes with exceptions, but all three equations have three unknowns) Of the system of equations is called the ternary system of equations.The solution of ternary equations is usually by adding or subtracting elimination method or generation elimination method first ternary equations into binary linear equations and then solve the binary An equation, of course