\(3x-1-\left(4x+15\right)=21\)
\(3x-1-4x-15=21\)
\(-x-16=21\)
\(-x=21+16\)
\(-x=37\)
\(x=-37\)
3x-1-4x-15=21
(3x-4x)+(-1-15)=21
-x-16=21
-x=37
Vậy x=-37
TÌM X
a) |5x|-3x=2
b) |x+6|-9=2x
c) |2x-3|+x=21
d) | 4+2x|= -4x
e) |3x-1|+2=x
f) |x+15|+1=3x
CÁC BẠN ƠI GIÚP MÌNH VỚI
Tìm x:
a,| 4 + 2x| = -4x
b,|3x - 1|+ 2 = x
c, |x + 15 | + 1 = 3x
d,| 2x - 5| = x + 2
tìm x biết
a) 3x - |2x+1|=2
b) |3x-2| +5x = 4x-10
c) |4x+3|-x=15
Tìm x:
a) ( 4x + 1)( x - 3) - ( x - 7 )( 4x - 1) = 15
b) ( 3x - 5)( x + 1) - ( 3x - 1)( x + 1) = x - 4
Giúp mk vs nha, mk rất gấp!!!
: 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,y
4x=3y và 3x-y =21
tìm x :
4x - 15 = ( -75 ) -x
72 - 3x = 5x + 8
3 /x-7 / =21
-7 /x+3/ = -49
-12 (x-5 ) +7 ( 3 - x ) =5
gúp mk nhé ! .... [ " / / " là giá trị tuyệt đối nha]
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) 5x-3 {4x-2 [4x-3(5x-2)]}=182
bài 1 tìm x
a 2/3x+5/7=3/10
b 3/4x-1/8=3/7
c -21/13x+1/3=2/3
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
