00:01
We have a given an equation x minus 4, so mod of x minus 4 minus 4 minus 1 is equal to minus 4 x.
00:07
First we have to unwritten the modulus function.
00:10
Modulus function gives always positive value.
00:13
So, properties of the modulus function, mod of y is equal to a, then we can define y is equal to plus minus a when when a greater than equal to a greater than to 0.
00:33
We will apply this property here.
00:36
First we will write like that adding both side 1 then you will get a 1 minus 4 x.
00:45
Now apply this property.
00:48
So we will write x minus 4 is equal to plus minus 1 minus 4 x when 1 minus 4 x greater than equal to 0.
01:01
We need to solve also this into a reality.
01:08
First, we will solve the value of x from this equation.
01:11
So x minus 4 is equal to 1 minus 4x or x minus 4 is equal to minus 1 plus 4x.
01:21
Now add both side 4x then here we'll get x plus 4x minus 4x equal to minus 1...