Question

Tìm x biết : 2× |x+1|=10

Answer 1

2 .|x + 1| =10

|x + 1| = 10 : 2

|x + 1| = 5

x + 1 = 5 hay x + 1 = (-5)

x = 5 - 1 hay x = (-5) - 1

x = 4 hay x = (-6)

Answer 2

2 x (X+1)=10

X+1 =10:2=5

X =5-1=4

Answer 3

2 x |x + 1| = 10

|x + 1| = 10 : 2 = 5

=> x + 1 = 5 hoặc x + 1 = -5

x = 4 x = -6

vậy x = 4 hoặc x= -6

Answer 4

2.|x+1|=10

|x+1|=10:2

|x+1|=5

TH1:

x+1=5

x=5-1

⇒x=4

TH2:

x+1=-5

x=(-5)-1

⇒x=-6

vậy .....

Answer 5

\(2.\left|x+1\right|=10\Leftrightarrow\left|x+1\right|=5\Leftrightarrow\left[{}\begin{matrix}x+1=5\left(ĐK:x\ge-1\right)\\x+1=-5\left(ĐK:x< -1\right)\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=4\left(TM\right)\\x=-6\left(TM\right)\end{matrix}\right.\)