If the given equations are such that the coefficients of one of the variables are numerically equal in both equations,it is possible to eliminate the variable by addition or subtraction.假设已知的两个方程中有一个变量...If the given equations are such that the coefficients of one of the variables are numerically equal in both equations,it is possible to eliminate the variable by addition or subtraction.假设已知的两个方程中有一个变量的系数相等,那么就可以用加法或减法消去一个变量.展开更多
文摘If the given equations are such that the coefficients of one of the variables are numerically equal in both equations,it is possible to eliminate the variable by addition or subtraction.假设已知的两个方程中有一个变量的系数相等,那么就可以用加法或减法消去一个变量.