Tìm X:

a) 75 $\times$ (x + 157) = 24 450 + 21 000	b) 14 700 : (x + 47) = 84 – 35
c) 69 $\times$ (x – 157) = 18 837 + 24 564	d) 41 829 : (x – 384) = 98 – 25

a) (x + 268) $x$ 137 = 48 498

x + 268 = 48 948 : 137

x + 268 = 354

x = 354 – 268

x = 86

b) (x + 3 217) : 215 = 348

x + 3 217 = 348 $x$ 215

x + 3 217 = 74 820

x = 74 820 – 3 217

x = 71 603

c) (x – 2 048) : 145 = 246

x – 2 048 = 246 $x$ 145

x – 2 048 = 35 670

x = 35 670 + 2 048

x = 37 718

d) (2 043 – x) $x$ 84 = 132 552

2 043 – x = 132 552 : 84

2 043 – x = 1 578

x = 2 043 – 1 578

x = 465

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