`2^(x+2) = 2^7`
`<=>x+2 = 7`
`<=> x = 5`
`2^x . 4 = 128`
`=> 2^x = 128 : 4
`=> 2^x = 32`
`=> 2^x = 2^5`
`=> x = 5`
2x.4=128
Hai ngũ 4 = 128 nha
a, x + 3x = 360 b, 41 - (2x - 5) = 18 c, 2x . 4 = 128
a)2x – 12.4 = 28
b)128-3(x +4)= 23
c) 20 + 8.(x + 3) = 52 .4
d) (12x -4 3 ).83= 4.84
e) 720: [41-(2x-5)]=23 .5
f) (2x- 4)(x – 3) = 0
g) (2x +1)3= 5.25
h) 2 x . 4 = 128
i) 5x-2 = 1
k)2x + 2x + 3= 144
| b, 2x + 15 = -27 | |
| c, -765 – (305 + x) = 100 |
d, 2x : 4 = 16 e)128 – 3( x + 4 ) = 23 |
2x-7=5
128-3.(X+4)=23
Tìm x, biết
a) 17 2 − 2 x − 3 4 = − 7 4
b) 3 x 7 + 1 : − 4 = − 1 28
a, 2x . 4 = 128
b, x15 = x 1
c, (2x + 1)3 = 125
d, (x – 5)4 = (x - 5)6
e, x10 = x
f, (2x -15)5 = (2x -15)3
a. 41 – (2x – 5) = 18
b. 2x. 4 = 128
Giúp em đi ạ, em đang cần gấp
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
