Mary is x years old how old will she be in 12 years?how old was she 6 years ago
x+12 in 12 years and x-6 6 years before
In 12 years, she will be x + 12 years old.
six years ago, she was x - 6 years old.
x can be various numbers. To answer the questions you need to think of a number 7 or up (it can be halves, etc.):
in 12 years: 6 years ago:
x=7: 19 years old 1 year old
x=8: 20 years old 2 years old
x=9: 21 years old 3 years old
x=?: ?+12 ?-6
Here is how to solve it: There's a pattern... If you need any more info please message me...