Andrew and Blake had equal amount of money at first. Andrew then spent $10 while Blake was given another $56. In the end, Andrew has one-third as much money as Blake. How much money did Andrew have at first?

amount at beginning Andrew = Blake = x after eventful day: Andrew has x - 10 Blake has x + 56 Andrew has one-third as much money as Blake ---> x - 10 = (1/3)(x+56) multiply by 3 3x - 30 = x + 56 2x = 86 x = 43