只含有一个未知数、未知数的最高次数为1的等式叫做一元一次方程使方程左右两边的值相等的未知数的值,叫做方程的解-Contains only a maximum number of unknown, unknown to 1 equation is called a yuan a equation that the values are equal on both sides of the equation about the value of the unknown is called a solution of the equations