-5x+-2x=21

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Solution for -5x+-2x=21 equation: 



-5x+-2x=21

We move all terms to the left:

-5x+-2x-(21)=0

determiningTheFunctionDomain
-5x-2x-21+=0

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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