|x—1| —3 =7
|x—1|=4
\(\Rightarrow\)x-1=4,x-1=-4
x=5,x=-3
|x—2| + 5 = 17
|x—2|=12
\(\Rightarrow\)x-2=12,x-2=-12
x=14,x=-10
|x-1|-3=7
|x-1| =7+3
|x-1| =10
=>x-1=10
x-1=-10
Khi x-1=10
x =10+1
x =11
Khi x-1=-10
x =(-10)+1
x =-9
=>x=11;x=-9
a)|x-1|=x-1
x-1-3=7
x-4=7
x=11
b)|x-2|=x-2
x-2+5=17
x+3=17
x=14
| x- 1 | - 3 = 7
| x - 1 | = 7- 3
| x - 1 | = 4
Suy ra : x - 1 = 4 Hoac x - 1 = -4
x = 4 + 1 x = -4 + 1
x = 5 x = -3
Suy ra x { 5 , -3 }
Vay x { 5 , -3 }
th1:x-1=10
x= 9
th2 : x-1= - 10
x= - 9
Vậy .........................................................................................................................................................................
câu b : /x-1/=12
th1 x-1=12
x=13
th2 tự làm chúc may mắn ,nhớ tích cho mk