<span><span>A=P+prt</span><span>A=P+prt</span></span>Since <span>tt</span> is on the right side of the equation, switch the sides so it is on the left side of the equation.<span><span> P+prt=A</span><span>P+prt=A </span></span>Since PP does not contain the variable to solve for, move it to the right side of the equation by subtracting <span>PP</span> from both sides.<span><span>prt=−P+A</span><span>prt=-P+A</span></span>Divide each term by <span><span>pr</span><span>pr</span></span> and simplify. <span>t=−<span>P<span>pr</span></span>+<span><span>A<span>pr</span></span></span></span>