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c+c+c+c+28=(c+4+4+4+4)
We simplify the equation to the form, which is simple to understand
c+c+c+c+28=(c+4+4+4+4)
Remove unnecessary parentheses
c+c+c+c+28=+16+1c
We move all terms containing c to the left and all other terms to the right.
+1c+1c+1c+1c-1c=+16-28
We simplify left and right side of the equation.
+3c=-12
We divide both sides of the equation by 3 to get c.
c=-4
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