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What property was applied to solve the equation below?

Negative StartFraction 3 over 8 EndFraction x = 48
Negative StartFraction 3 over 8 EndFraction (Negative StartFraction 8 over 3 EndFraction) x = 48 (Negative StartFraction 8 over 3 EndFraction).
x = negative 128
Addition Property of Equality
Subtraction Property of Equality
Multiplication Property of Equality
Division Property of Equality

Multiplication property of Equality. I tried my best to decipher the text you added, and it seems to me like you end up multiplying both sides of the equation by 8/3. This is the reciprocal of 3/8, so multiplying them together leaves you with -x. When 48 is multiplied by 8/3 you get 128, so x=-128. The Multiplication Property of Equality states that if you multiply both sides of an equation by the same number, the sides remain equal.