a,(x-1)^2=1
=>x-1=1
x=1+1
x=2
Vậy....
b, 7^2x-6=49
=>7^2x-6=7^2
=>2x-6=2
2x=2+6
2x=8
x=8:2
x=4
Vậy....
c,(2x-16)^7=128
=>(2x-16)^7=2^7
=>2x-16=2
=>2x=2+16
2x=18
x=18:2=9
Vậy......
d,565-13.x=370
=>13.x=565-570
=>13.x=(-5)
x=-5/13
Vậy.......
e,105-(135-7x):9=97
=>(135-7x):9=105-97
=>(135-7x):9=8
=>135-7x=8.9=72
7x=135-72
7x=63
=>x=9
Vậy...
f,275-(113+x)+63=158
275-(113+x)=158-63=95
113+x=275-95=180
x=180-113
x=67
Vậy......
g,[3.(x+2):7].4=120
3.(x+2):7=120:4=30
3.(x+2)=30.7=210
x+2=210:3=70
x=70-2=68
Vậy...
h, x(x-1)=0
=> x=0 hoặc x-1=0
=>x=0 hoặc x=0+1=1
Vậy.....
i, (x+2)(x-4)=0
=>x+2=0 hoặc x-4=0
   x=0-2             x=0+4
   x=-2               x=4
Vậy.......
k,(x-140):7=3^3-2^3.3
(x-140):7=3
x-140=3.7=21
x=21+140=161
Vậy......
l,x^3.x^2=2^8:2^3
x^3+2=2^5
x^5=2^5
=>x=2
Vậy.....
m,3^(x-3)-3^2=2.3^2
3^(x-3)-9=18
3^x-3=18+9=27
3^x-3=3^3
=>x-3=3
x=3+3=6
Vậy.......