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{{ printedBook.courseTrack.name }} {{ printedBook.name }} When rewriting equations it's important to make the **the same operation on both sides** to ensure that the equality still holds. So, if one side is subtracted by a number, the other side must be subtracted by the same number. In the equation $8x+3=19$ both sides can be subtracted by $3.$
$8x+3−3=19−3⇔8x=16$