846 : [41 - (7x - 5)] = 47
41 - (7x - 5)=846:47=18
7x - 5=41-18=23
7x=23+5=28
x=28:7=4
(4x- 1)² = 25.9
(4x- 1)² =225=152
4x- 1=15
4x=15+1=16
x=16:4=4
846 : [41 - (7x - 5)] = 47
41 - (7x - 5)=846:47=18
7x - 5=41-18=23
7x=23+5=28
x=28:7=4
(4x- 1)² = 25.9
(4x- 1)² =225=152
4x- 1=15
4x=15+1=16
x=16:4=4
a) x thuộc Ư(30) và x> 10.4 b) (4x-1)^2=25.9 c) 846:[41-(7x-5)]=47
Tìm x: ( 4x - 1)2 = 25.9
Tìm x: ( 4x - 1)2 = 25.9
Tìm x:
a) (32+23).x+42.2.x=98
b) 846:[41-(2x-5) = 22+52
Tìm số tự nhiên x biết:
a) 25 + 7x = 144
b) 33 - 12x = 9
c) 128 - 3(x + 4) = 23
d) 71 + (726 - 3x).5 = 2246
e) 720 : [41 - (2x + 5)] = 40
f) (10 - 4x) + 120 : 8 = 16 + 1
g) x + 9x + 7x + 5x = 2244
h) (x + 1) + (x + 2) + (x + 3) +...+ (x + 100) = 5750
i) 1 + 2 + 3 +...+ x = 500500
j) 51 + 52 + 53 +...+ x = 18825
a)17+x=-5 +2x
b)15-3x=-22-4x
c)47-(4x+5)=-(3x-2)
d)-58+(3-7x)=15-8x
Tìm x:
a. 2x = 16
b. 2x - 15 = 17
c. ( 4x - 1)2 = 25.9
tìm x biết: (4x - 1)² = 25.9
Tìm x ∈ N biết:
a, x - 3 : 2 = 5 14 : 5 12
b, 30 : x - 7 = 15 19 : 15 18
c, x 70 = x
d, 2 x + 1 3 = 9 . 81
e, 5 x + 5 x + 2 = 650
f, 4 x - 1 2 = 25 . 9