x − f e ma l e y − a ll s t u d e n t s z = 21 x = 0 , 75 y x + z = y 0 , 75 y + 21 = y ∣ s u b t r a c t 0 , 75 y 21 = 0 , 25 y ∣ d i v i d e b y 0 , 25 y = 84 T h ere a re 84 s t u d e n t s in c l a ss .
The total number of students in the Algebra 1 class is 84. This includes 21 males and 63 females. Therefore, the breakdown shows that 75% of the class is female and 25% is male.
;