In 4 years' time, Sarah will be twice as old as her son. Sarah gave birth to Jimmy her only son when she was 29 years old. <hr> Sarah is <input min="0" type="number" id ="imp5pg023q3_1" class="lineinput" placeholder="?" /> years old, and her son Jimmy is <input min="0" type="number" id ="imp5pg023q3_2" class="lineinput" placeholder="?" /> years old now.