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(v+5)*2+30+v*2=380
We move all terms to the left:
(v+5)*2+30+v*2-(380)=0
We add all the numbers together, and all the variables
(v+5)*2+v*2-350=0
We multiply parentheses
2v+v*2+10-350=0
Wy multiply elements
2v+2v+10-350=0
We add all the numbers together, and all the variables
4v-340=0
We move all terms containing v to the left, all other terms to the right
4v=340
v=340/4
v=85
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