The correct option is B x=6
Changing side is called transposing. While transposing a number, we change its sign.
Transposing a number (i.e., changing the side of the number) is the same as performing a mathematical operation on both sides.
In the given equation, x+4=10.
⟹ x=10−4 [Transposing 4 to the other side]
Hence, we get x=6.