CÂU 1
A_) X-36:18=12+(-15)
=> x - 2 = 12 - 15
=> x - 2 = - 3
=> x = - 3 + 2 
=> x = - 1
b) 16.4^X = 4^8
=< 4^2. 4^x = 4^8
=> 4^(2 + x) = 4^8
=> 2 + x = 8
=> x = 8 - 2
=> x = 6
C) |X-2|+1=5
=> |x - 2 | = 5 - 1 = 4
=> x - 2 = 4 hoặc 2 - x = 4
=> x = 6 hoặc x = - 2

a) X-36:18=12+(-15)
<=> x - 2 = 12 - 15
<=. x = 12 - 15 + 2
<=> x = -1

a) x-36:18=12+(-15)
    x-36:18=12 - 15
    x-36:18=-3
    x - 2 = -3
    x = -3 + 2
    x = -1
Vậy x = -1
b) 16.4^x = 4^8
     4^2.4^x = 4^8
     4^x = 4^8 : 4^2
     4^x = 4^6
  => x = 6
vậy x = 6
c) |x-2|+1=5
    x - 2 = 5 - 1
    x - 2 = 4
   x = 4 + 2
   x = 6
vậy x = 6

a) 5(2-x)= 35
   2-x = 35 : 5
   2 - x = 7
   x = 7 + 2
   x = 9
Vậy x =9
b) 29x-13=45
     29x = 45 + 13
     29x = 58
     x = 58 : 29
     x = 2
vậy x = 2
c) (3x-2^4).7^3=2.7^4
    (3x-2^4).7^3 = 4802
     3x-2^4 = 4802 : 7^3
     3x-2^4 = 14
     3x - 16 = 14
     3x = 14 + 16
     3x = 30
      x = 30 : 3
     x = 10
Vậy x = 10