3-4c=21

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Solution for 3-4c=21 equation: 



3-4c=21

We move all terms to the left:

3-4c-(21)=0

We add all the numbers together, and all the variables

-4c-18=0

We move all terms containing c to the left, all other terms to the right

-4c=18

c=18/-4

c=-4+1/2

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