Julia, the zookeeper, used the equation 52.5 + x = 75 to find the answer. Which equation is an equivalent equation that can be used to solve the problem?

To isolate x in 52.5 + x = 75, subtract 52.5 from both sides. This gives x = 75 − 52.5, or 75 − 52.5 = x. Choice C, “75 − 52.5 = x,” is equivalent and can be used to find x.

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