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a+3.4=-1.28
We simplify the equation to the form, which is simple to understand
a+3.4=-1.28
We move all terms containing a to the left and all other terms to the right.
+1a=-1.28-3.4
We simplify left and right side of the equation.
+1a=-4.68
We divide both sides of the equation by 1 to get a.
a=-4.68
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