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2=8+4a
We simplify the equation to the form, which is simple to understand
2=8+4a
We move all terms containing a to the left and all other terms to the right.
-4a=+8-2
We simplify left and right side of the equation.
-4a=+6
We divide both sides of the equation by -04 to get a.
a=-1.5
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