4x + 5(x - 3) = 3
=> 4x + 5x - 15 = 3
=> 9x = 3 + 15
=> 9x = 18
=> x = 18 : 9
=> x = 2
4x + 5(x - 3) = 3
=> 4x + 5x - 15 = 3
=> 9x = 3 + 15
=> 9x = 18
=> x = 18 : 9
=> x = 2
tìm x
5)
4x x 5 x 4x 3 5
6)
2
2
x 2 x 1 6
7)
2
3
(3 2) 3 .
4
x x x
8) (3x + 1). (2x- 3) – 6x.(x + 2) = 16
7.1 cho f (x) = X^5 + 3x^2-5x^3-x^7+x^3+2x^2+X^5-4x^2+2x^7
cho g(x)=x^4+4x^3-5x^8-x^7+x^3+x^2-2x^7+x^4- 4x^2-x^8
Tìm x,biết
a) 2x ( x-5) - 2(x2-7x+3)+3=5(4x-2)
b)7x(2x-1)-5(4x+3)=14x(x-5)
Tìm x biết
a) (7^x-2+7^x-1+7)/57=(5^x+5^2x+1+5^2x+3)/131
b) (4x-3)^4=(4x-3)^2
Tìm x:
a) 4x( x - 5) - ( x - 1)( 4x - 3) = 5
b) ( 12x - 5)( 4x - 1) + ( 3x - 7)( 1 - 16x) = 81
c) ( x - 1)( 2x - 3) - ( x + 3)( 2x - 5) = 4
Mk gấp lắm, ai nhanh mk tick nha!
B1 :Tính
a) (6x^4 - 4x^2 + 3x -2) : (3x - 2)
b) (6x^3 +3x^2 +4x+2) : (3x^2+2)
c) (x^5 +4x^3 +3x^2 - 5x +15 ): ( x^3 -x +3
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 4x(x-5)-(x-1) (4x-3)-5=0 mn giúp mình với