x + 3.(x - 1) = 4
x + 3.x - 3.1 = 4
x + 3x - 3 = 4
4x = 4 + 3
4x = 7
x = 7 : 4
x = \(\frac{7}{4}\)
Vậy x = \(\frac{7}{4}\)
Ôn tập toán 8
Các câu hỏi tương tự
Tìm x:
a. 2x(x - 1) - x(4 - x) = 0
b. 3(1 - 4x)(x - 1) + 4(3x - 2)(x + 3) = -27
Bai1:tìm x biết.
a)4×(x-5)-(x-1)×(4x-3)=5
b) (3x-4)×(x-2)=3x×(x-9)-3
c)(x-5)×(x-4)-(x+1)×(x-2)=7
d)(2x-1)×(x-2)-(x+3)×(2x-7)=3
Tìm x
( x - 5 ) ( x + 5) - ( x + 3)^2 +3(x-2)^2 = ( x+1 )^2 - (x+4) (x-4) +3x^2
Tìm x:
a) 3 x (12x - 4) - 9 x (4 x - 3) = 30
b) x (5 - 2x) + 2x (x - 1) = 15
Bài 1: Tìm x biết
a) x. ( x+4) . ( 4 - x ) + ( x-5 ) . ( x2 +5x + 25 ) = 3
b) ( x+1 )3 - ( x-1 )3 - 6 . ( x-1 )2 = -10
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Tìm x
(X-1)^3 + 3(x-3)^2 -(x+2)(x^2-2x+4) = (x+2)^3 -(x-3)(x^2+9) - 6x^2 + 5
Tìm x :
a) x(x - 4 ) - ( x^2 - 8 ) = 0
b) ( 3x + 2 )( x - 1 ) - 3( x + 1 )( x - 2 ) = 4
c) x( x + 5 )( x - 5 ) - ( x + 2 )( x^2 - 2x + 4 ) = 17
Tìm x biết
a) x. ( x+4) . ( 4 - x ) + ( x-5 ) . ( x2 +5x + 25 ) = 3
b) ( x+1 )3 - ( x-1 )3 - 6 . ( x-1 )2 = -10
c) ( x-3 ) . ( x2 + 3x + 9 ) + x. ( x+2 ) . ( 2-x ) = 1
Tìm x
(X-1)^3 + 3(x-3)^2 -(x+2)(x^2-2x+4) = (x+2)^3 -(x-3)(x^2+9) - 6x^2 + 5
Tìm x :
b) ( 3x + 2 )( x - 1 ) - 3( x + 1 )( x - 2 ) = 4