Question 140873
Solving equations is basically "undoing" what was done to the x.  In this case, you need to "undo" additon of +3 by subtracting 3 from each side.

2x+3=8
2x+3-3 = 8-3
2x= 5


Next, to "undo" multiplication by 2, divide both sides by 2.
x=5/2 or 2.5


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