how many solutions has equation |4x-4|=12? ( one or two? )

| 4x - 4 | = 12

Since there's
an absolute value sign, change this equation
to

4x - 4 = -12   and 4x -4 =12
now add 4 on both sides on both equation

By
adding, you should get

4x = -8    and 4x = 16
now divide by 4 on both sides and on both
equation

By dividing, your equation should look
like

x = -2  and x =
4

So your answer is x = -2 ; 
4

So there are two solutions