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4.1+6.4c=--7.5
We simplify the equation to the form, which is simple to understand
4.1+6.4c=+7.5
We move all terms containing c to the left and all other terms to the right.
+6.4c=+7.5-4.1
We simplify left and right side of the equation.
+6.4c=+3.4
We divide both sides of the equation by 6.4 to get c.
c=0.53125
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