Solve for v
v\in \mathrm{R}
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28v+20\geq 28v+18
Use the distributive property to multiply 4 by 7v+5.
28v+20-28v\geq 18
Subtract 28v from both sides.
20\geq 18
Combine 28v and -28v to get 0.
v\in \mathrm{R}
This is true for any v.
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