1.Tìm x
a, x ː 2,2 = (28,7 - 13,5 ). 2
b, (3 3/4 . x +75%) ː 2/3 = -1
c, 4x - ( 3 + 5x ) = 14
a) - 27 + 2 (x - 5) = 4x (- 7) . 5
b) - 8 - 5 (3 - x) = 9 - 3 (x - 1) - 1 . 17 . 3
c) 9 - 4 (4 + x) +1 = 1 - 3 (x + 1) + (- 5)
a, | 3x + 5 | + | x - 3 | = - 10
b, | x | + | x - 2 | = 0
c, | -x - 3 | + | -49 | = 27
d, 4x + 5 - | x + 3 | = 11 với x > -3
Bài 4
a, | x | + | y - 1 | = 0
b, | x - 1 | + | 2y - 4 | < 0
tìm x:
2(x-5)+3=-7
4x+(27+2^3)=1
/x-3/+5=-27
-3/x-1/=-27
18- 4x = -20-6x
h)-15 x 24 = - 7x +32
i) 15x- 3(4x - 6) = - 12+ 36
k) -10 x - 27 = - 7x +33
m) -17 x - 24 = - 9x - 40
n) -23 x 25 = - 18x +75
p) - 5x+ 7( 2x-3) = 4( x - 4)
q)24- 6(3x + 1) = -5( 4x- 4 ) - 8
r) 18-4. (6-2x) = -3.(4x +5 ) - 11
Jup mik pls
Bài 1:
a) 3^x=9
b) 5^x=125
c) 3^x+1=9
d) 6^x-1=36
e) 3^2x+1=27
f) x^50=x
Bài 2:
a) 2^x :4=32
b)3^x:3^2
c)5^x-1:5=5^3
d)4^2x-1:4=4^4
Bài 3:
a) (2x+1)^3=27
b) 4x^3+15=47
3^4x+2 = 27^x+3
Timf `x`:
`(x - 2)/3 = (x + 1)/4`
`(x - 2) . 4 = (x + 1) . 3`
`<=> 4x - 8 = 3x + 3`
`<=> 4x - 3x = 3 + 8`
`<=> (4 - 3)x = 11`
`=> x = 11`
Tìm số tự nhiên x biết:
a, 4x - 24 = 336
b, 4.(3x - 4 ) - 2 = 18
c, 3x : 32 = 27