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-28+15-23c=31
We simplify the equation to the form, which is simple to understand
-28+15-23c=31
We move all terms containing c to the left and all other terms to the right.
-23c=+31+28-15
We simplify left and right side of the equation.
-23c=+44
We divide both sides of the equation by -23 to get c.
c=-1.91304347826
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