14=21-7x

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Solution for 14=21-7x equation: 



14=21-7x

We move all terms to the left:

14-(21-7x)=0

We add all the numbers together, and all the variables

-(-7x+21)+14=0

We get rid of parentheses

7x-21+14=0

We add all the numbers together, and all the variables

7x-7=0

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

7x=7

x=7/7

x=1

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