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5(c-9)=-10
We simplify the equation to the form, which is simple to understand
5(c-9)=-10
Reorder the terms in parentheses
+(+5c-45)=-10
Remove unnecessary parentheses
+5c-45=-10
We move all terms containing c to the left and all other terms to the right.
+5c=-10+45
We simplify left and right side of the equation.
+5c=+35
We divide both sides of the equation by 5 to get c.
c=7
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