Why are the solutions to the proportions StartFraction 40 over 8 EndFraction = StartFraction x over 10 EndFraction and StartFraction x over 40 EndFraction = StartFraction 10 over 8 EndFraction the same?
because both result in the equation 8 x = 400, which simplifies to x = 5
because both result in the equation 8 x = 400, which simplifies to x = 50
because both result in the equation 40 x = 80, which simplifies to x = 2
because both result in the equation 40 x = 80, which simplifies to x = 20

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