Tìm X:

a) x $\times$ 45 – 3 168 = 13 036 + 5 621	b) 12 495 : x + 5 247 = 3 522 + 2 460
c) 16 875 : x $\times$ 96 = 5 568 – 1 248	d) 117 504 : x : 72 = 48 $\times$ 6

a) x $\times$ 45 – 3 168 = 13 036 + 5 621

    x $\times$ 45 – 3 168 = 18 657

    x $\times$ 45              = 18657 + 3 168

    x $\times$ 45              = 21 866

    x                      = 21 866 : 45

    x                      = 485

b) 12 495 : x + 5 247 = 3 522 + 2 460

     12 495 : x + 5 247 = 5 982

     12 495 : x              = 5 982 – 5 247

     12 495 : x              = 735

                   x              = 12 495 : 735

                   x              = 17

c) 16 875 : x $\times$ 96 = 5 568 – 1 248

    16 875 : x $\times$ 96 = 4 320

    16 875 : x         = 4 320 : 96

    16 875 : x         = 45

                  x         = 16 875 : 45

                  x         = 375

d) 11 504 + x : 72 = 548 ´ 26

    11 504 + x : 72 = 14 248

                   x : 72 = 14 248 – 11 504

                   x : 72 = 2 744

                   x         = 2 744 ´ 72

                   x         = 197 568