Students in a dance class filled out a survey. there were 25 girls and some boys who
participated in the survey. the results showed that 20% of the students prefer tap dance to
ballroom dance. there are 9 students who prefer tap dance. which equation can be used to
find the number of boys ( x) who participated in the survey?
a. 0.2 x + 25 = 9
b. 0.2( x + 25) = 9
c. 0.2(25 – 9) = x
d. 25 + x = 0.2 × 9