12x+14=7x-21

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Solution for 12x+14=7x-21 equation: 



12x+14=7x-21

We move all terms to the left:

12x+14-(7x-21)=0

We get rid of parentheses

12x-7x+21+14=0

We add all the numbers together, and all the variables

5x+35=0

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

5x=-35

x=-35/5

x=-7

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