Find a common denominator in the two fractions before you can do anything
1) 12
2) 2y
3) 12+2y
4) 12+2y
You have to be very careful how you set this up. For every girl (who counts as 1) there are 3 boys (who count as 3). The total number in the proportion is 3 + 1 =4. You are given a total, but that is both boys and girls. That's why you need the 4.
3/4 = x / 236 Cross multiply
4x = 3 * 236
4x = 708 Divide by 4
x = 708/4
x = 177
There are 177 boys at the school and 236 - 177 = 59 girls.
The answer is obviously three.
Answer:
c=775
Step-by-step explanation:
