Solve - vp + 30 < 45 for v

-vp+30<45 subtract 30 from both sides

-vp<15 divide both sides by - p (and reverse direction of inequality sign because of division/multiplication by a negative value)

v>-15/p

First we start by subtracting over the 30 to the right side of the equation.

-vp<45-30

-vp<15

then to isolate v, we have to divide by - p

v>-15/p

(remember to switch the less than sign to greater than because we brought over a negative to the other side)

final answer: v>-15/p