What is the value of x? how can you find the value of y if you know the value of x?

ummm it depends on the question for example if they give u a number for a certain variable if u could solve it like y-x=4  what is the value of x if y= 5 ?

5-x=4 so 5-4=1  ans: x= 1

or what is the value of y in terms of x    

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation:

i believe the answer is c.