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-1.6c+5=-7.8
We simplify the equation to the form, which is simple to understand
-1.6c+5=-7.8
We move all terms containing c to the left and all other terms to the right.
-1.6c=-7.8-5
We simplify left and right side of the equation.
-1.6c=-12.8
We divide both sides of the equation by -1.6 to get c.
c=8
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