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28a+14=15a-7
We simplify the equation to the form, which is simple to understand
28a+14=15a-7
We move all terms containing a to the left and all other terms to the right.
+28a-15a=-7-14
We simplify left and right side of the equation.
+13a=-21
We divide both sides of the equation by 13 to get a.
a=-1.61538461538
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