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8.4a+4.38=-67.86
We simplify the equation to the form, which is simple to understand
8.4a+4.38=-67.86
We move all terms containing a to the left and all other terms to the right.
+8.4a=-67.86-4.38
We simplify left and right side of the equation.
+8.4a=-72.24
We divide both sides of the equation by 8.4 to get a.
a=-8.6
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