The equation −3(4d+7.2)+2d=−2(6d−6.4)−70.9 represents the location of a scuba diver in feet, d, compared to sea level. Solve the
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So, this question is basically asking us "If we had an x instead of a 2, would this be true?" We can try and see what we get:
So, if we want to show this we have to change the numerator or denominator in such a way that we can cancel some common factors. Notice that
If we replace the factored numerator with the original one, we get:
Since we have an equality, this relation is proved.