If you calculate you will find x = 2
31x + 3 = 65
67x + 1 = 135
I like to do it by adding 4 and 3 to get 7. then divide 35 by 7. that would be 5. take 5*4 to get 20 boys and 5*3 to get 15 girls.
First we have to divede the tota of students into the sice of each grop so:

So we can aproximate this to a whole number so:
Answer:
The word per indicates the slope (m) of a linear function, y=mx +b.Using d for x and p for y , the equation representing Ashely's reading is p = 10d. Carly begins on page 40 which represents b, the y intercept of a linear function which indicates an initial amount. So the equation representing Carly's reading is p=8d + 40.
The answer is C. Hope this helps