\(\dfrac{1}{11}\left(1-3x\right)=\dfrac{1}{5}x-\dfrac{1}{2}\\ \Leftrightarrow\dfrac{1}{11}-\dfrac{3}{11}x=\dfrac{1}{5}x-\dfrac{1}{2}\\ \Leftrightarrow\dfrac{1}{5}x-\dfrac{1}{2}+\dfrac{1}{11}+\dfrac{3}{11}x=0\\ \Leftrightarrow\dfrac{26}{55}x-\dfrac{9}{22}=0\\ \Leftrightarrow\dfrac{26}{55}x=\dfrac{9}{22}\\ \Leftrightarrow x=\dfrac{45}{52}\)
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
/x^2+1/+/-5x/=11-3x+x^2
bài 1 Tim x a, 0,6x(x-0,5)-0,3x(2x+1,3)=0,138. , b, 3x2-3x(-2+x)=36. c, 2.(5x-8)-3(4x-5)=4(3x-4)+11 d, 1/3x2-4x+2x(2-3x)=0. e, 5x-3{4x-2(5x-2)]}=182 bài 2 thực hiện phép tính a, (-2x3-1/4y-4yz)8xy2 c,-6x+3(7+2x) e, 1/3xz(-9xy+15yz)+3x2(2yz2-yz)
2)a)5 2/3x+5 1/2 = 11 1/6
b) 3 3/5x-2/7=1 9/35
c)2/9 - 7/8x = 1/3
d) -1 4/5x - 1 1/10+25%
Cho B= (3x.4x-11)+5x2.(x-1)-4x.(3x+9)+x.5x-5x2
a) Rút gọn
b) Tính giá trị của B khi |x| = 2
c) Tìm x biết B=207
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
Tìm một nghiệm của đa thức sau:
P(x)= 7x^2 - 5x + 2
Q(x)= 1/3x^2 + 2/5x -11/15
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
3x+2/5x+7=3x-1/5x+1
