SOLUTION: I am three years older than my sister and i am 18 years old how old is my sister

SOLUTION: I am three years older than my sister and i am 18 years old how old is my sister

Algebra.Com

Question 507593: I am three years older than my sister and i am 18 years old how old is my sister
Answer by rcscmccc(2) (Show Source): You can put this solution on YOUR website!
18=x+3
18-3=x+3-3
15=x

RELATED QUESTIONS
I am six years old and twice older than my sister. how old is my... (answered by Jeetbhatt10th,MathTherapy)

My sister is three years older than me i am 18 how old is... (answered by Maths68)

my sister is three years older than i am . the sum of our age is 29. how old am i ? (answered by stanbon)

my sister is 5 years older than i am. in 5 years, she will be 18 years old. how old am... (answered by ewatrrr)

I am 6 years older than my sister. The sum of our ages is 24 years. How old am... (answered by MathLover1)

i was five times as old as my sister five years ago, and i am three times older than her... (answered by JenniferTutors)

I was five times as old as my sister five years ago, and I am three times older than her... (answered by scott8148)

I am 30 years old and my sister is 10. I need an equation to figure out how old my sister (answered by stanbon)

I am 6 years older than my sister. my brother is 6 years older than i am. the sum of our... (answered by josgarithmetic,ikleyn,greenestamps)