\(d,3.2^{x+2}-9.2^x=96\\ 3.2^2.2^x-9.2^x=96\\ 12.2^x-2^x.9\\ 2^x.\left(12-9\right)=96\\ 2^x.3=96\\ 2^x=96:3\\ 2^x=32\\ 2^x=2^5\\ x=5\)
\(d,3.2^{x+2}-9.2^x=96\\ 3.2^2.2^x-9.2^x=96\\ 12.2^x-2^x.9\\ 2^x.\left(12-9\right)=96\\ 2^x.3=96\\ 2^x=96:3\\ 2^x=32\\ 2^x=2^5\\ x=5\)
d) 3.2
x+2 − 9.2
x = 96
1/2.2x+4.2x=9.2x
2x+4.2x+1+3.2x+2 =92
Tìm x ∈ N , biết.
a) 3 x + 1 : 3 4 = 81
b) 3 x + 3 . 3 x + 1 = 729
c) 2 x + 3 . 2 x = 128
d) 23 + 3 x = 5 6 : 5 3
e) 2 x + 2 x + 4 = 272
Tìm x ∈ N, biết.
a, 3 x + 1 : 3 4 = 81
b, 3 x + 3 . 3 x + 1 = 729
c, 2 x + 3 . 2 x = 128
d, 23 + 3 x = 5 6 : 5 3
e, 2 x + 2 x + 4 = 272
Bài 2: Tìm số tự nhiên x, biết:
a) 100-7(x-5)=58 b) 12(x-1):3=43+23
c) 24+5x=75:73 d)5.(x-1)-206=24.4
e) 5(x-4)2-7=13 f) (x+1)+(x+2)+....+(x+30)=795
g) 2x+3 - 3.2x+1=32 h) 221-(3x+2)3=96
Mn bày e gấp
4.2x+3.2x+1=80
62x + 3.2x = 9.29
2x+3 - 3.2x+1 =32