52x-3 - 2.52 = 52 . 3
52x-3 - 2.25 = 25 . 3
52x-3 - 50 = 75
52x-3 = 75 + 50
52x-3 = 125
53 = 125
2x = 3 + 3
2x = 6
x = 6 : 2
x = 3
52x-3 - 2.52 = 52 . 3
52x-3 - 2.25 = 25 . 3
52x-3 - 50 = 75
52x-3 = 75 + 50 = 125
52x-3 = 53
=> 2x - 3 = 3
2x = 3 + 3
2x = 6
x = 6 : 2
x = 3
Vậy x =3
Ủng hộ mk nha !!! ^_^
52x-3 - 2.52 = 52. 3
52x-3 - 2 =( 52 : 52). 3
52x-3 -2 = 3
52x-3 = 5
52x-3 = 51
=> 2x - 3 = 1
2x = 4
x = 2
vậy x = 2
ủng hộ mk nha !!! ^_^
\(5^{2x-3}-2.5^2=5^2.3\)
\(\Rightarrow5^{2x-3}=5^2.3+2.5^2\)
\(\Rightarrow5^{2x-3}=5^3\)
\(\Rightarrow2x-3=3\)
\(\Rightarrow2x=6\)
\(\Rightarrow x=3\)
52x-3 - 2.52 = 52 . 3
=>52x-3 - 2.52 =75
=> 52x-3 - 2= 75: 25
=>52x-3 - 2=3
=>52x-3 =3+2
=>52x-3 =5
Vì 51 =5
=>2x-3=1
=>2x= 1+3
=>2x=4
=>x=2