6-7a=20

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Solution for 6-7a=20 equation: 



6-7a=20

We move all terms to the left:

6-7a-(20)=0

We add all the numbers together, and all the variables

-7a-14=0

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

-7a=14

a=14/-7

a=-2

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