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2c+2(10+c)+10=130
We simplify the equation to the form, which is simple to understand
2c+2(10+c)+10=130
Reorder the terms in parentheses
2c+(+20+2c)+10=130
Remove unnecessary parentheses
+2c+20+2c+10=+130
We move all terms containing c to the left and all other terms to the right.
+2c+2c=+130-20-10
We simplify left and right side of the equation.
+4c=+100
We divide both sides of the equation by 4 to get c.
c=25
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