Answer:
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19
Step-by-step explanation: (75/5) + 4= p
15+4=p
19=p
r =
multiply both sides of the equation by r - 3
t(r - 3 ) = r ( distribute and collect terms in r together )
tr - 3t = r
tr - r = 3t ( factor out r )
r(t - 1 ) = 3t ( divide both sides by r - 1 )