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-7(v+4)=49
We move all terms to the left:
-7(v+4)-(49)=0
We multiply parentheses
-7v-28-49=0
We add all the numbers together, and all the variables
-7v-77=0
We move all terms containing v to the left, all other terms to the right
-7v=77
v=77/-7
v=-11
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