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4(65-9c)+9c=75
We simplify the equation to the form, which is simple to understand
4(65-9c)+9c=75
Reorder the terms in parentheses
+(+260-36c)+9c=75
Remove unnecessary parentheses
+260-36c+9c=+75
We move all terms containing c to the left and all other terms to the right.
-36c+9c=+75-260
We simplify left and right side of the equation.
-27c=-185
We divide both sides of the equation by -27 to get c.
c=6.8518518518519
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