4a-8a+-7a=-20

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Solution for 4a-8a+-7a=-20 equation: 



4a-8a+-7a=-20

We move all terms to the left:

4a-8a+-7a-(-20)=0

We add all the numbers together, and all the variables

-11a+20=0

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

-11a=-20

a=-20/-11

a=1+9/11

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