640=15x-520

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Solution for 640=15x-520 equation: 



640=15x-520

We move all terms to the left:

640-(15x-520)=0

We get rid of parentheses

-15x+520+640=0

We add all the numbers together, and all the variables

-15x+1160=0

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

-15x=-1160

x=-1160/-15

x=77+1/3

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