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-3-9(1+8v)=-31
We move all terms to the left:
-3-9(1+8v)-(-31)=0
We add all the numbers together, and all the variables
-9(8v+1)-3-(-31)=0
We add all the numbers together, and all the variables
-9(8v+1)+28=0
We multiply parentheses
-72v-9+28=0
We add all the numbers together, and all the variables
-72v+19=0
We move all terms containing v to the left, all other terms to the right
-72v=-19
v=-19/-72
v=19/72
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