Question

6) Maria bought seven boxes. A week later

half of all her boxes were destroyed in a fire.
There are now only 22 boxes left. With
how many did she start?

Answer 1

37

Explanation:

Maria started with x boxes.

When she bought 7 boxes, she has (x+7).

Half of her boxes are destroyed (x+7)/2.

Half of her boxes left (x+7)/2.

And

(x+7)/2 = 22

x+7=44

x= 44 -7 = 37