徒弟每小时加工零件38个，师傅每小时加工零件的个数比徒弟的2倍少20个，师傅每小时加工多少个零件？)\:W9x0S
算式：提示'D6F/J/o(K;L(X*M7T;m0D,u)\:W9x0S
答：师傅每小时加工+_1d(x1T9`:|个零件。)\:W9x0S