7-x-6x=21

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Solution for 7-x-6x=21 equation: 



7-x-6x=21

We move all terms to the left:

7-x-6x-(21)=0

We add all the numbers together, and all the variables

-7x-14=0

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

-7x=14

x=14/-7

x=-2

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