8x-x+3=21

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Solution for 8x-x+3=21 equation: 



8x-x+3=21

We move all terms to the left:

8x-x+3-(21)=0

We add all the numbers together, and all the variables

7x-18=0

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

7x=18

x=18/7

x=2+4/7

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