Tìm x |12-2x|=0
Bài 13: Tìm x biết: a) (x-2)(x-3)-D0. b) (x-3)(x-4)-0. c) (x-7)(6-x)=0. d) (x-3)(x-13)=0. The Bài 14: Tìm x biết: a) (12-x)(2-x)=0. b) (x-33)(11-x)=0. c) (21-x)(12-x)=0. d) (50-x)(x-150) =0. Bài 15: Tìm x biết: a) 2x +x = 45. b) 2x +7x = 918. c) 2x+3x 60+5. d) 11x+22x 33.2.
x^3+2x^2-2x-12=0. tìm x
Tìm số nguyên x biết: a) x + 12 = 4; b) 19 - x = 0; c) 2x - 4 = -12;d) 2x- (-2) = 6
a)x=4-12=-8
b)x=19-0=19
c)x=-12+4:2=-4
d)x=6+(-2):2=2
tìm x biết: 2x^2+12+2x(4-x)=0
2x^2+12+2x(4-x)=0
2x^2+12+8x-2x^2=0
8x+12=0
8x=-12
x=-12/8=-3/2
tìm STN x
2x + 69 . 2 = 69 . 4
2x - 12 - x = 0
(x-7) . (2x - 8) = 0
2x+69.2=69.4
2x+138=276
2x = 276-138
2x = 138
x = 138:2
x = 69
2x-12-x = 0
<=> 2x-x-12 =0
(2x-x)-12=0
=> x-12=0
x = 0+12
x =12
(x-7)(2x-8)=0
\(\Rightarrow\hept{\begin{cases}x-7=0\\2x-8=0\end{cases}}\Rightarrow\hept{\begin{cases}x=7\\x=4\end{cases}}\)
Vậy ...
a, 2X+69.2=69.4
2X+138=276
2X=276-138=138
X=138:2=69
b,2X-12-x=0
2X-X=12-0
x=12
mik chi biet vay thoi con cau cuoi mik chiu
2x+69.2=69.4
2x=69.4-69.2
2x=69.(4-2)
2x=69.2
x=69.2/2
x=69
2x-12-x=0
2x-x=0+12
x=12
(x-7).(2x-8)=0
ta có hai trường hợp:
trường hợp 1: x-7=0
x=7
trường hợp 2:
2x-8=0
2x=8
x=4
bạn cố gắng hiểu nha. mình làm hơi tắt.
tìm x :(4-x).(2x+12)=0
\(x\in\left\{4;-6\right\}\)
Tìm x :
a, (x - 12).105 = 0
b, 47.(27-x) = 47
c, 2x + 69.2 = 69 .4
d, 2x - 12 -x =0
a, => x-12 = 0
=> x=12
b, => 27-x =1
=> x= 27-1 -26
c, => 2x = 69(4-2) =69.2
=> x=69
d, => x-12=0
=> x=12
a) (x - 12) . 105 = 0
=> x - 12 = 0
=> x = 12
b) 47 . (27 - x) = 47
=> 27 - x = 1
=> x = 27 - 1 = 26
c) 2x + 69 . 2 = 69 . 4
=> 2x = 69 . 4 - 69 . 2
=> 2x = 69 . (4 - 2) = 69 . 2
=> x = 69 . 2 : 2
=> x = 69
d) 2x - 12 - x = 0
=> x - 12 = 0
=> x = 12
a ) ( x - 12 ) x 105 = 0
x - 12 = 0 : 105
x - 12 = 0
x = 0 + 12
x = 12
b ) 47 x ( 27 - x ) = 47
27 - x = 47 : 47
27 - x = 1
x = 27 - 1
x = 26
c ) 2x + 69 x 2 = 69 x 4
2x + 138 = 276
2x = 276 - 138
2x = 138
x = 138 : 2
x = 69
d ) 2x - 12 - x = 0
2x - x = 0 + 12
x = 12
tìm x,biết: (12+2x)(2x-3)=0 giúp mik với mn :(
=>x+6=0 hoặc 2x-3=0
=>x=-6 hoặc x=3/2
2x - 12 - x = 0
TÌM X
2x - 12 - x = 0
2x - x - 12 = 0
x - 12 = 0
x = 0 + 12
x = 12
Vậy ....
2x - 12 - x = 0
2x - x - 12 = 0
x - 12 = 0
x = 0 + 12
x = 12
2x-12-x=0
x-12=0
x=0+12
x=12