21x+3+66=90

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Solution for 21x+3+66=90 equation: 



21x+3+66=90

We move all terms to the left:

21x+3+66-(90)=0

We add all the numbers together, and all the variables

21x-21=0

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

21x=21

x=21/21

x=1

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