\(\dfrac{5}{4}-6x=7\dfrac{1}{2}\)
\(\dfrac{5}{4}-6x=\dfrac{15}{2}\)
\(6x=\dfrac{5}{4}-\dfrac{15}{2}\)
\(6x=-\dfrac{25}{4}\)
\(x=-\dfrac{25}{4}:6\)
\(x=\dfrac{-25}{24}\)
\(\dfrac{5}{4}-6x=7\dfrac{1}{2}\)
\(\dfrac{5}{4}-6x=\dfrac{15}{2}\)
\(6x=\dfrac{5}{4}-\dfrac{15}{2}\)
\(6x=-\dfrac{25}{4}\)
\(x=-\dfrac{25}{4}:6\)
\(x=\dfrac{-25}{24}\)
Bài 1: a, x + 0,5 = -2/3 b, x - (-2/5) = 5/7 c, 5/4 - 6x = 7 1/2 d, 3 - 2x - (5/4 - 7/5) = 9/20 bài 2: a, x : (-2/3) mũ 3 = -2/3 b, (2/5) mũ 5 nhân x = (2/5) mũ 7 c, 343/125 = (7/5) mũ x d, (-1/3) nhân x = 1/243
*Dạng 2: Đa thức BT1: Thực hiện phép tính a) 3x(x^2-5x+7) b) (x+4)(-x^2+6x+5) c) (3x-1)(3x+5)-7(x^2+2) d) (-5x^5 + 2x^4 - 1/3x^3): (-1/2x^3)
f(X)=7^5+x^4-2x^3+4;g(x)=x^4+6x^3-9x^2-2x-1
1)x+2014/2+2x+4028=x+2014/5+x+2014/6
2) -2/5+5/6x=-4/15
b) 3/4+1/4 :x=2/5
c) x/2-(3x/5-13/5)=-(7/5+7/10x)
d)-3-2/3.(-10/9-25/3)-5/6
Tìm x biết :
a) -2/5+5/6x=-4/15 b) 2/3+7/4:x=5/6
bài 1: tính
a) -6x+3(7+2x)
b)15y-5(6x+3y)
c) x(2x+1)-x2(x+2)+(x3-x+3)
d)4(x-6)-x2(2+3x)+x(5x-4)3x2(x-1)
bài 2: tìm x
a)3x+2(5-x)=0
b)3x2-3x(-2+x)=36
c)5x(12x+7)-3x(20x-5)=-100
Thực hiện phép chia:
a) \((3x^5-9x^6+12x^9):3x\)
b) \((6x^4+4x^3+8x^2):(2x)\)
c) \((8x^6+16x^5-10x^4):(2x^4)\)
d) \((4x^4+6x^5+14x^7):(2x^3)\)
1.Tìm x trong tỉ lệ thức
(1/3x):2/3=1 và 3/4 : 2/5
0,2:1 và 1/5 = 2/3 : (6x + 7 )
x-1/-15=-60/x-1
x-1/7=9/x-1
x-3/5-x=5/7
x-1/x+2=x-2/x+3
a)1/6x + 1/10x - 4/15x + 1=0
b)(1/7x - 2/7)(-1/5x + 3/5)(1/3x + 4/3)=0
c)(x - 1/3)(y - 1/2)(z - 5)=0 và x + 2=y + 1=z + 3