Lisa has a certain amount of money. She spent 39 dollars and has 3/4th of the original amount left. How much money did she have originally
If \(\frac { 3 }{ 4 }\) is left, that means \(\frac { 1 }{ 4 }\) was spent. So \(\frac { 1 }{ 4 }\) of the total amount is equal to 39.. Let's say x to the total amount. \(\frac { 1 }{ 4 } \cdot x=39\\ x=4\cdot 39\\ x=156\\\)