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我们知道,能使二元一次方程组的两个方程左、右两边的值都相等的一对未知数的取值,叫做二元一次方程组的解.显然,方程组的解必须同时适合两个方程.
We know that the value of a pair of unknowns that makes the left and right sides of the two equations of the binary equation system equal, is called the solution of the binary equation system. Obviously, the solution of the system of equations must fit both equation.