Question

A total of 61 people attended Tamya's birthday party. Tamya's brother invited some of the guests. If Tamya invited 19 more than her brother, how many guests did each person invite?

Answer 1

total guests = 61

tamya's = t

brother = b

t = b + 19

t + b = 61

b + 19 + b = 61

2b + 19 = 61

2b = 61 - 19

2b = 42

b = 42/2

b = 21

t = 21 + 19

t = 40

Tamya invited 40 guests

her brother invited 21 guests