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19c+2c-c-7=13
We simplify the equation to the form, which is simple to understand
19c+2c-c-7=13
We move all terms containing c to the left and all other terms to the right.
+19c+2c-1c=+13+7
We simplify left and right side of the equation.
+20c=+20
We divide both sides of the equation by 20 to get c.
c=1
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