Cyzarine was asked by her teacher to subtract 4 from a number and to divide the result by 8. However, she subtracted 8 from that number and divided the result by 4 to get 45. If she had done it correctly, what answer would she have gotten?
Two candles have different lengths and thickness. The shorter lasts 9 hours and the longer 7 hours when both are lit simultaneously. If after 4 hours of their being lit together at the same time, both have the same length, then find the ratio of their original lengths.