a)tìm x biết: 5^x-1 + 5^x-3= 650
b)tìm x biết: gttd x+1 +gttd x+2 +.......+gttd x+100=605x (gttd: giá trị tuyệt đối)
c) tìm x,y biết : (2x+1)/5=(4y-5)/9=(2x+4y-4)/7x
tìm x biết: a)(2x+1)^2-4(x+2)^2=9
a=x+5/x+1 b=2x+4/x+3 c=3x+8/x-1 d=2x-3/x-1 e=5x+9/x+5 g=4x+9/2x+1 h=6x+5/2x-1 i=4x-6/2x+1 k=4x+4/2x+4 n=4x+6/2x+2
: 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, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
Tìm x biết
a,|x-1|+2x=3
b,|x+1|+|x+3|=10-4x
c,|x+1++3|x-2|-5|4-x|=13-2x
d,3|x-2|-2.|x+5|+4.|x-1|=9-7x
Tìm x biết;
a, |x-1|+|x-2=1
b, |3x+4| = 2|2x-9|
c,|x+3|-2x=|x-4|
d, |x+2| + |x-5| + |x-1| = 7
e,8x - |4x+1|=x+2
help me :))
Tìm x biết : 4.(5-x)-3.(1-x)= -9 và (2x+1)^2=16.Cảm ơn các bạn
Tìm x, biết:
1) |2x-1| = -19- x
8) | 2x-1| =x
9) | 2x+3|= 3x
10) | x+2| = 2x