Question

I have to solve this using linear equations. But I don't understand how to model the equation with the information given.
Jeannie is 8 years older than her younger sister April. When added together, their ages equal 198. How old is April?
A.
27
B.
35
C.
95
D.
103

Answer 1

Let Jeannie's age is x years and April's age is y years.
so Jeannie is 8 years older than her younger sister April i.e.,x=y+8
When added together, their ages equal 198 i.e., x+y=198

Answer 2

solve the two equations and find their ages.

Answer 3

April is 95 years old? is that right?

Answer 4

correct..!

Answer 5

I used substitution to solve, not elimination. Either works. But we already had x=y+8 so I just plugged that into x+y=198.

Answer 6

in mathematics, all that matters is to find correct results eitherway.

Answer 7

Can you help me with another? I still don't understand how to model and equation with the age differences.

Answer 8

ok

Answer 9

Rachel is 3 years older than Sarah. Their ages add to 67.
I have to find the correct system..

Answer 10

Let the ages of Rachel and Sarah are x and y years respectively.
Rachel is 3 years older than Sarah means
Age of rachel(x)= Age of Sarah(y)+3
so x=y+3
Their ages add to 67 i.e., x+y=67

Answer 11

Oh thank you! I get it now.

Answer 12

you're welcome..:)