How did we get a=c here? If they are equal then they can not be cut

In this where we cancalled (a-c) this implies that a-c can not be zero because we can cut variables only when we are sure that it can not take the value of zero then how come they have implied that a=c after cancelling them out the whole point is that it must not be equal to zero

1

Please log in to comment and participate in discussions.

Comments (1)

how does cancelling a-c implies that it is not equal to zero?

it is same as taking 2 common from lhs and rhs both sides (or 4-2 and 4-2) . here, neither 4 nor 2 equals zero.

1