



 
Hi Tash, Notice that on the right side of $A = P + Prt$ there is a common factor of $P.$ Pull out this common factor and then solve for $P.$ This will result in an expression for $P.$ For your second question $A = \$1000, t = 1$ (I assume $t$ is in years) and the interest rate $r = 5\% = 0.05.$ Solve for $P.$ Penny  


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