已知:○+○+○+○=△+□,□=△+△,○=3,△=?,□=?0k,C(I1M9[0e7j
解:△=1o*v.Z5l*o:g9_;W0t,□=9S6e2W0n0](W(Z+I5I/{5q:I*I,]9D0k,C(I1M9[0e7j