2x + 2x + 1 + 2x + 2 + 2x + 3 = 480
2x + 2x . 2 + 2x . 22 + 2x . 23 = 480
2x . ( 1+ 2 + 22 + 23) = 480
2x . 15 = 480
2x = 32
2x = 25
=> x = 5
Vậy x = 5
Bài 2 Tìm x biết 1, (2x-2).(3x+1)-(3x-2).(2x-3)=5 2,(1-3x).(3x-5)-(2x-4)(2-3x)=x-6 3,(2x-1).(4x^2+2x+1)-(2x+1)(4x^2-2x+1)=5x+6 Giúp tớ với
biết f(x)=x^2+2x+3/5 2x^3+3 ; g(x) = -2x^2-1/2x^3 -3x +6
tìm h(x) = 2f(x) - 1/2g(x)
: Tìm x, biết:
a) 3x( 4x- 1) - 2x(6x- 3 )=30 b) 2x(3-2x) + 2x(2x-1)=15
c) (5x-2)(4x-1) + (10x +3)(2x - 1)=1 d) (x+2) (x+2)- (x -3)(x+1) = 9
e) (4x+1)(6x-3) = 7 + (3x – 2)(8x + 9) g) (10x+2)(4x- 1)- (8x -3)(5x+2) =14
Tìm x, biết
a)(2x-1)^5-(2x-1)^8=0
b)(2x+1). (2x-3)<0
c)(x-1). (2x+3)>0
tìm x biết |x-2|+|3-2x|=2x+1
Tìm x biết:
a) 3x-|2x+1|=2
b)2.|5x-3|-2x=14
c)|x+1|+|x+2|+|x+3|=4x
d)|x-2|+|3-2x|=2x+1
e)|x-3|=(-2).|x+4|
1:Tìm x, biết:
a) (3/5)^2x-1 = 125/27
b)1/2+(1/2.3)+(1/3.4)+...+(1/2015.2016)-2x=1/2-1/2016
c)/2x^2+/x-2//=2x^2+3
Tìm x biết:
1) | 2x-1| = -19 -x
2) | 4- 3x| = 2x- 10
3) | x| = 3+ 2x
Tìm x biết:
1) | 2x-1| = -19 -x
2) | 4- 3x| = 2x- 10
3) | x| = 3+ 2x
Tìm x biết:
1) | 2x-1| = -19 -x
2) | 4- 3x| = 2x- 10
3) | x| = 3+ 2x
