Adam is now 9 years older than brianna and 13 years ago he was twice as old as she was then. how old are adam and brianna now?

Let current age of Adam = x years

Let current age of Brianna = y years

Question says that "Adam is now 9 years older than Brianna "

Which means x=y+9 ...(i)

To find the age 13 years ago, we just subtract 13 from age of each person.

Age of Adam before 13 years = (x-13) years

Age of Brianna before 13 years = (y-13) years

Question says that "13 years ago he was twice as old as she was then"

Which means (x-13)=2(y-13) ...(ii)

plug value of x from equation (i) into (ii)

(x-13)=2(y-13)

(y+9-13)=2(y-13)

y-4=2y-26

y-2y=-26+4

-y=-22

y=22

plug value of y=22 into equation (i)

x=y+9 = 22+9 = 31

Hence Adam is 31 years old and Brianna is 22 years old.

mark branliest

step-by-step explanation:

.6 is 1/2 of 12

the answer is actually d. i just took the test

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation: