5x=125
=>5xx=53
=> x=3
Vậy x=3
32x=81
=>32x=34
=>2x=4
=>x=4:2=2
Vậy x=2
Tk mk
a, => 5^x = 5^3
=> x = 3
b, => 3^2x = 3^4
=> 2x = 4
=> x = 2
Tk mk nha
a,5x=125
5x=53
=>x=3
b,32x=81
32x = 34
=>. 2x = 4
=> x = 4 : 2
=> x = 2
~~ học tốt ~~
a)5x=125
5x =53
b)32x=81
32x=34
suy ra 2x=4
x =4:2=2
còn câu c tớ chịu
5X =125
5x = 53
=> x = 3
32x = 81
32x = 34
=> 2x = 4
x = 4: 2
x = 2
52x-3 -2.25=25.3
52x-3 - 50 = 75
52x-3 = 75+50
52x-3 = 125
5 2x-3 = 53
=> 2x-3 = 3
2x = 3+3
2x = 6
x= 6: 2
x = 3