Pls help i thought i understood it but it was incorrect the first time

Question

asked Feb 7, 2023 55.5k views

1 Answer

Salomon Zhang · Answer 1 · 2023-02-13T14:18:05+0000

Subtraction property of equality

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Reason:

We subtract 18 from both sides to go from 4x+18 = 78 to 4x = 60

So we use the aptly named subtraction property of equality.

In general that rule is if a = b, then a-c = b-c