We are given equation 18 − 2x = 4x. (Given)
2x is being subtracted from left side of the equation.
The reverse operation of the subraction is addition.
So, we need to add 2x on both sides.
Adding 2x on both sides, we get
18 − 2x+2x = 4x+2x
( By Addition property of equality)
18 = 6x
We need to get rid 6 from both side.
Dividing both sides by 6, we get
18/6=6x/6
( By Division Property of equality)
3=x.