: 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 số nguyên x, biết
a) \(-\dfrac{x}{2}+\dfrac{2x}{3}+\dfrac{x+1}{4}+\dfrac{2x+1}{6}=\dfrac{8}{3}\)
b) \(\dfrac{3}{2x+1}+\dfrac{10}{4x+2}-\dfrac{6}{6x+3}=\dfrac{12}{26}\)
tìm x biết
a)1/6+x=5/12
b3/4+1/4x=-1/2
c)7 mũ 2x +7 mũ 2x +3=344
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)(2x+2)(2x-2)-4x(x+5)=8
b)(4x+5)(4x-5)-8x(2x-7)=11
c)(1/2x-3)(1/2x+3)-1/4x(x+5)=11/2
d)(3x+2)(3x-2)-4x(x+2-5x2=18
Tìm x biết
a, 3/7 - x = 1/2x - 3
b, 5x - 2/3 = 5/3 - 2x
a)(2x^2-x+3)-(x^2-4x+2)+(x^2-5x-1)
b)(-3x^2+2x-5)-(4x^-2x-7)+(3x^2-8x+1)
bài 1: tìm đa thức M biết
a, \(M+x^2\)\(-3xy-y^2\)=\(2x^2\) \(-y^2+xy\)
b,\(x^2y^2-2x^2y^3+2x^2-y^3-P=x^2y^3-3x^2y^2-x^2\)
bài 2: tìm nghiệm của các đa thức sau
a, \(5\left(x-2\right)-2\left(x+3\right)\)
b, \(5x^2-125\)
c,\(2x^2-x-3\)
giúp mik vs ạ
tìm x:
a) |4 - x| + 2x = 3
b) |x - 7| + 2x + 5 = 6
c) 3x - |2x + 1| = 2
d) |x + 2| - x = 2
e) |x - 3| = 21
f) |2x + 3| - |x - 3| = 0
g) |x + 1/8| + |x + 2/8| + |x + 5/8| = 4x
h) |x - 2| - |2x + 3| - x = -2
i) |2x - 3| - x = |2 - x|
k) 2. |x - 3| - |4x -1 = 0