21x+3=66

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Solution for 21x+3=66 equation: 



21x+3=66

We move all terms to the left:

21x+3-(66)=0

We add all the numbers together, and all the variables

21x-63=0

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

21x=63

x=63/21

x=3

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