1 Answer

RyanS · Answer 1 · 2017-07-29T05:19:46+0000

All you need to do is set 3x + 4 = 72 - x.

Add x on both sides to get 4x + 4 = 72.

Then subtract 4 on both sides to get
4x = 68.

Then divide 68 by 4 to get x by itself. X should equal the result of 68 / 4

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