A certain middle school requires that every student participates in at least one of the two science fairs held during the year. If 195 of the 280 students participate in the school fair and 155 participate in the district fair, what percent of the students participate in both?

answer: it's d

step-by-step explanation:

2

step-by-step explanation:

the solution is x=1

step-by-step explanation:

we are given our   equation as

let's assume

left side function is

right side function is

now, we can draw graph

and then we can get intersection point

the intersection point will be solution

so, the solution is

x=1