Let’s begin with the definition of equivalent equations.

We speak of “Equivalent Equations” when we have two (2) equations that are having the same solution set.

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The transcript of the video.

For example: Are the equations *x *= 7 and *x *+ 2 = 9 equivalent?

The solution:

Our number 7 is the single possible solution of the equation *x *+ 2 = 9.

Similarly, the number 7 is the only solution of this equation: *x *= 7.

Therefore we can say that *x *= 7 and *x*+2 = 9 have identical solution sets, so they are equivalent.

Another example: Are the equations *x *= 1 and *x*2 = *x *equivalent?

The solution: If we inspect this, the equation *x*2 = *x *has two solutions, 0 and 1.

On the other hand, our equation *x *= 1 has just a single solution, namely 1.

Hence, the equations *x*2 = *x *and *x *= 1 do not have the same solution sets and are not equivalent.

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