= −3
                                  = (−3) + (8  −  1)(3)
                               8
                                  = (−3) + (7)(3)
                               8
                                  = (−3) +  21
                               8
                                  =  18
                               8
                              Jawaban : A
                         3. Diketahui :
                                 =  30     = −5
                              15
                             Ditanyakan :
                                 = ⋯ ?
                               6
                              Jawab:
                                 =      + (    −  1)  
                                 
                                 =  30
                              15
                                 + (15  −  1)    =  30
                                 +  14    =  30
                                 +  14(−5) =  30
                                 −  70  =  30
                                 =  100
                                 =  100  + (6  −  1)(−5)
                               6
                                 =  100  + (5)(−5)
                               6
                                 =  100  −  25
                               6
                                 =  75
                               6
                             Jawaban : C
                                                              19