Let x = How much money you have in your savings now. Let y = the cost of the pair of shes. Then from the condition you have these two equations x + 0.15x = y - 9 dollars (1) x + 0.35x = y + 17 dollars (2) Subtract equation (1) from equation (2) to eliminate x. You will get 0.35x - 0.15x = 17 - (-9) 0.2x = 26 x = 26/0.2 = 130 dollars. ANSWER. Your savings now is/(are) 130 dollars.