Question

Maria bought 7 boxes. A week later half of all her boxes were destroyed. There are now 22 boxes left. With how many did she start? Write an equation

Answer 1

X boxes + 7 boxes = 22(2) Boxes
X boxes + 7 boxes = 44 boxes
X boxes +7 boxes - 7 boxes = 44 boxes - 7 boxes
X = 37 boxes

Answer 2

Call the number of boxes she started with X. Now she bought another 7 (X+7). Then she destroyed half (X+7)/2 and this equals the 22 left. so (x+7)/2 =22 :)