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6.4-a/3.8=10.9
We simplify the equation to the form, which is simple to understand
6.4-a/3.8=10.9
We move all terms containing a to the left and all other terms to the right.
-0.26315789473684a=+10.9-6.4
We simplify left and right side of the equation.
-0.26315789473684a=+4.5
We divide both sides of the equation by -0.26315789473684 to get a.
a=-17.1
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