17 - x = 7 - 6x
6x - x = 7 - 17
5x = - 10
x = - 2
Vậy x = - 2
Trl:
\(17-x=7-6x\)
\(\Rightarrow6x-x=17-7\)
\(\Rightarrow5x=10\)
\(\Rightarrow x=10:5\)
\(\Rightarrow x=2\)
( 2x + 4 ).( 1 - 3x ) . x = 0
+ T/h 1 : 2x + 4 = 0
2x = - 4
x = -2
+ T/h 2 : 1 - 3x = 0
3x = 1
x = \(\frac{1}{3}\)
+ T/h 3 : x = 0
Vậy x = 0 ; x = \(\frac{1}{3}\) ; x = - 2
\(\left(2x+4\right).\left(1-3x\right).x=0\)
Th1 : 2x + 4 = 0 => 2x = -4 => x = -2
Th2 : 1 - 3x = 0 => 3x = 1 => sai đề
Th3 : x = 0
Vậy x = -2 ; x = sai đề ; x = 0
\(17-x=7-6x\)
\(\Leftrightarrow-x+6x=7-17\)
\(\Leftrightarrow5x=-10\)
\(\Leftrightarrow x=-2\)
Vậy x=-2
\(\left(2x+4\right)\left(1-3x\right)x=0\)
\(\Leftrightarrow\) 2x+4=0
hoặc 1-3x=0
hoặc x =0
=> x=-2 ; x= 1/3 hoặc x=0
_Minh Ngụy_
17-x=7-6x
=>6x-x=7-17
=>5x=(-10)
=>x=(-10):5
=>x=(-2)
(2x+4).(1-3x).x=0
=>(2x+4).(1-3x).x=0
=>(2x+4).(1-3x).x=0 <=>(2x+4)=0 hoặc (1-3x)=0 hoặc x=0
TH1
2x+4=0
=>2x=0-4
=>2x=(-4)
=>x=(-4):2
=>x=(-2)
TH2
1-3x=0
=>3x=1-0
=>3x=1
=>x=1/3
TH3
x=0
Vậy x thuộc {0;1/3;(-2)} thì(2x+4).(1-3x).x=0
17-x=7-6x
-x+6x=7-17
-5x=-10
5x=10
x=10:5
x=2
vậy x=2
(2x+4).(1-3x).x=0
* 2x+4=0 * 1-3x=0 * x=0
2x=-4 3x=1
x=-4:2 x=1/3
x=-2
vậy x=-2 hoặc x=1/3 hoặc x=0