7+9x=21

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Solution for 7+9x=21 equation: 



7+9x=21

We move all terms to the left:

7+9x-(21)=0

We add all the numbers together, and all the variables

9x-14=0

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

9x=14

x=14/9

x=1+5/9

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