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28=1\2(8)(a+3)
We simplify the equation to the form, which is simple to understand
28=1\2(8)*(a+3)
Reorder the terms in parentheses
multiplication of parentheses
28=1\2*(+8a+24)
Reorder the terms in parentheses
28=+(+8a+24)
Remove unnecessary parentheses
+28=+8a+24
We move all terms containing a to the left and all other terms to the right.
-8a=+24-28
We simplify left and right side of the equation.
-8a=-4
We divide both sides of the equation by -08 to get a.
a=0.5
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