0
3X + 5 = 23
subtract 5 from each side
3X + 5 - 5 = 23 - 5
3X = 18
divide both sides integers by 3
(3/3)X = 18/3
X = 6
=======check by inserting 6 where X is in original equation
3(6) + 5 = 23
18 + 5 = 23
23 = 23
========checks
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