Violympic toán 8
Các câu hỏi tương tự
tìm x biết
a) (5x-1)2-(5x-4)(5x+4)+7
b)5x2+4xy+4y2+4x+1=0
c)(x+2)3-x(x-1)(x+1)=6x2+21
1. Tìm x
a. (5x-7)(x-9)-(-x+3)(-5x+2)= 2x(x-4)-(x-1)(2x+3)
b. (x-3)(-x+10)+(x-8)(x+3)= (5x^2-1)(x+3)-5x^3-15x^2
Tìm x
1) 2-3x5x +10
2) 13-7x 4x-20
3) 11-9x 3 -7x
4) 5( 2x -3 ) - 4 ( 5x-7) 19-2 ( x+11)
5) 4 ( x+3) -7x+17 8( 5x -1)+166
6) 17-14(x+1)13-4(x+1)-5(x-3)
7)5x-3,5+ ( 3x-4)
8) 7 (4x +3)- 4 (x-1) 15 (x+0,75)+7
9) 3x -2,42 + 0,8 3,38 - 0,2x
10) 9 ( x+3) + 6 4 ( 5x +9 )
Đọc tiếp
Tìm x
1) 2-3x=5x +10
2) 13-7x =4x-20
3) 11-9x =3 -7x
4) 5( 2x -3 ) - 4 ( 5x-7) = 19-2 ( x+11)
5) 4 ( x+3) -7x+17= 8( 5x -1)+166
6) 17-14(x+1)=13-4(x+1)-5(x-3)
7)5x-3,5+ ( 3x-4)
8) 7 (4x +3)- 4 (x-1)= 15 (x+0,75)+7
9) 3x -2,42 + 0,8= 3,38 - 0,2x
10) 9 ( x+3) + 6 = 4 ( 5x +9 )
Bài 1: Giải phương trình
a, ( x-17)/33 + (x-21)/29 + x/25 =4
b, (3x-5)(7-5x)+(5x+2)(3x-2) =2
Xem chi tiết
( x-17)/33 + (x-21)/29 + x/25 =4
(3x-5)(7-5x)+(5x+2)(3x-2) =2
giải phương trình:
\(\frac{5x+1}{x^{2^{ }}+5}\)+\(\frac{5x+2}{x^{2^{ }}+4}\)+\(\frac{5x+3}{x^{2^{ }}+3}\)+\(\frac{5x+4}{x^{2^{ }}+2}\)=-4
1.Giải các phương trình sau:
A) 3x - 2 = 2x - 3
B) 2x + 3 = 5x + 9
C) 5 - 2x = 7
D) 10x + 3 - 5x = 4x + 12
E) 11x + 42 - 2x = 100 - 9x - 22
F) 2x - (3 - 5x ) = 4(x+3)
G) x(x+2) = x(x+3)
h) 2(x-3) + 5x(x-1)=5x2
Giải phương trình x+3/x^2-4 - x+1/x^2-5x+4 = 2x+4/x^2-5x+4
d) (5x+3) ( 4x-1) +(10x-7) (-2x+3) =27
e)(8x-5) (3x+2) -(12x+7) (2x-1)=17
f) (5x+9) (6x-1) -(2x-3)( 15z+1) = -190
g) 6x(5x+3) + 3x(1-10x) =7
h) (3x-3) (5 -21x) +(7x+4)(9x-5) =44\
i) (x+1)(x+2)(x-5)-x2 (x+8)=27