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(859-m)8=408
We move all terms to the left:
(859-m)8-(408)=0
We add all the numbers together, and all the variables
(-1m+859)8-408=0
We multiply parentheses
-8m+6872-408=0
We add all the numbers together, and all the variables
-8m+6464=0
We move all terms containing m to the left, all other terms to the right
-8m=-6464
m=-6464/-8
m=+808
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