Question

:)

Answer 1

b represents Jonna's brother age
there's a term "older than" so instead of going down like -
we use +

4 years older than... is usually +4

Answer 2

OK

Answer 3

I am still comfused... Is it A?

Answer 4

Hello?

Answer 5

yes, it is. The brother's age is b. Jonna's age is 4 more than b, or b+4
The sum of the ages is (b) + (b+4), which is 2b+4

Answer 6

So which one do you think it is?

Answer 7

oh i missed that.. thanks for refreshing my memory... I read too fast

Answer 8

Thank you!!!!!

Answer 9

I have another question

Answer 10

OH NOW I SAW WHAT HAPPENED!

sum of ages.. we have two people.. which is Jonna and her brother
b is Jonna's brother
b is also Jonna herself
+4 for "4 years older than "and it's also related to Jonna
Jonna is b+4 because b represents the age and +4 is how much older she is compared to b only which is her brother.
b+b+4 and combining like terms is 2b+4. Sorry about earlier xD!