Saving and investing are different because investing will generate and duplicate the initial money put it in while savings will stay the same amount without duplicating as it would if it was invested.
24x-36 . because you distribute the six to simplify your answer. <span />
7:35am in the 24 hour clock would still be 7:35am but if its 7:35pm we'll add 12 to the 7 which would then be 19:35
(-2/3, 2)
Solve for the first variable in one of the equations, then substitute the result into the other equation.