Respuesta :

–vp + 30 < 45
–vp  < 15
    p > -15/v

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  3w – 6r = 30
-6r = 30 - 3w  
   r = -5 + w/2
irspow
-vp+30<45  subtract 30 from both sides

-vp<15  divide both sides by -v  (remember to reverse inequality sign whenever you multiply/divide by a negative value!)

p>-15/v

...

3w-6r=30  divide both sides by 3

w-2r=10 subtract w from both sides

-2r=10-w  divide both sides by -2

r=(w-10)/2