There were 209 adults enrolled in the Lynn Dancing School in 2021. ⁴₁₁ of the adults were women. Additional adults joined the dancing school in 2022. For every 4 women who joined the dancing school, 3 men joined the dancing school. If there was an equal number of men and women in 2022, how many men joined the school in that year?

	Women	Men
Before	76	133
Change	+ 4 u	+ 3 u
After	76 + 4 u	133 + 3 u

Fraction of adults who are men
= 1 - ⁴₁₁
= ⁷₁₁

Number of women at first
= ⁴₁₁ x 209
= 76

Number of men at first
= ⁷₁₁ x 209
= 133

Women who joined : Men who joined
4 : 3

The number of men and women in the end is the same.

76 + 4 u = 133 + 3 u
4 u - 3 u = 133 - 76

1 u = 57

Number of men who joined the school in that year
= 3 u
= 3 x 57
= 171

Answer(s): 171