Question

tìm x biết: |2x-1|+1=4

Answer 1

Answer 2

\(\left|2x-1\right|\)+4=4

\(\left|2x-1\right|\)=4-4

\(\left|2x-1\right|\)=0

2x-1=0

2x=1

x=1/2

Answer 3

|2x-1|=4-1

|2x-1|=3

2x-1=3 hoặc 2x-1=-3

2x=3+1 hoặc 2x=-3+1

2x=4 hoặc 2x=-2

x=4:2 hoặc x=-2:2

x=2 hoặc x=-1

Answer 4

\(\left|2x-1\right|+1=4\)

\(\left|2x-1\right|=4-1\)

\(\left|2x-1\right|=3\)

\(2x-1=3\) hoặc \(2x-1=-3\)

\(2x=3+1\)          \(2x=\left(-3\right)+1\)

\(2x=4\)                \(2x=-2\)

\(x=4\div2\)            x = (-2) \(\div\) 2

x = 2                   x =  -1