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c/7 - 3 = 0
We simplify the equation to the form, which is simple to understand
c/7-3=0
Simplifying:
+ 0.142857142857c-3=0
We move all terms containing c to the left and all other terms to the right.
+ 0.142857142857c=0+3
We simplify left and right side of the equation.
+ 0.142857142857c=+3
We divide both sides of the equation by 0.142857142857 to get c.
c=21
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