2. Bài tập tìm x

Bài 1. Tìm x biết:

       a) x - 5² = 10                   b) 764 – 164: x = 723             c)

       d)                       e)                               

       f) (5^{x +1} – 61):2² = 2⁴                                                          g)

       h)                                              i) 2^x + 2^x+1  + 2^x+2  + 2^x+3 = 480       a) x - 5² = 10                   b) 764 – 164: x = 723             c)

       d)                       e)                               

       f) (5^{x +1} – 61):2² = 2⁴                                                          g)

       h)                                              i) 2^x + 2^x+1  + 2^x+2  + 2^x+3 = 480

       a) x - 5² = 10                   b) 764 – 164: x = 723             c)

       d)                       e)                               

       f) (5^{x +1} – 61):2² = 2⁴                                                          g)

       h)                                              i) 2^x + 2^x+1  + 2^x+2  + 2^x+3 = 480